Lathliss, Dragon Queen is a six-mana flier. Whenever another nontoken Dragon enters under your control she creates a 5/5 flying Dragon token, and for {1}{R} your Dragons get +1/+0. Every Dragon you cast is two Dragons.

The precon already has the cost reducers that make that cheap, including Dragonlord's Servant and Dragonspeaker Shaman. Each swap below pairs a cut with an add, and every card is scored with the same numbers the Oracle uses to build decks: synergy and inclusion from the Lathliss decks, plus lift, which shows how much more often a card turns up in Lathliss decks than in decks that could play it.

Looking for the unmodified list first? Read the Reign of Dragons precon guide.

14
Swaps
$45.39
Cost of the adds
38→38
Lands
15→34
Avg Oracle score

What is holding the deck back

Too few cheap Dragons

Lathliss only triggers on Dragons, so every cheap Dragon is a 5/5 flier waiting to happen. The precon leaves out several two- and three-mana Dragons that players run, such as Reckless Barbarian and Patron of the Arts, and plays a handful of non-Dragons instead.

Sweepers that hit your own team

Blasphemous Act, Chain Reaction and Chandra's Ignition all damage the Dragons you are building. Breath Weapon and Magmaquake are the better fits, since one skips Dragons and the other skips fliers.

A heavy top end

Ten nonland cards cost six or more, and the deck also plays nine mana rocks on top of 38 lands. Cheap Dragons and Dragon-only mana help it cast the top end sooner.

The 14 swaps

Each pair shows the numbers for the card coming out and the card going in. Click a card image to zoom.

Swap 1 of 14
Goddric, Cloaked Reveler
Cut
Goddric, Cloaked Reveler
Legendary Creature — Human Noble · 1RR
Inclusion7%
Synergy7%
Lift8.0×+
Oracle score 7
Ganax, Astral Hunter
Add
Ganax, Astral Hunter
Legendary Creature — Dragon · 4R
Inclusion67%
Synergy63%
Lift8.0×+
Oracle score 64

Goddric is a Human Noble with haste unless two or more nonland permanents entered under your control this turn, when he becomes a 4/4 flying Dragon. Most turns he is not a Dragon, so he rarely triggers Lathliss. He is in about one Lathliss deck in fourteen.

Ganax, Astral Hunter is a 3/4 flying Dragon for {4}{R}. Whenever Ganax or another Dragon enters under your control you create a Treasure, so each Dragon pays for the next. It is the highest-scoring card the precon is missing, played in two-thirds of Lathliss decks.

Swap 2 of 14
Basilisk Collar
Cut
Basilisk Collar
Artifact — Equipment · 1
Inclusion15%
Synergy3%
Lift1.3×
Oracle score 8
Dragon's Fire
Add
Dragon's Fire
Instant · 1R
Inclusion32%
Synergy30%
Lift8.0×+
Oracle score 31

Basilisk Collar gives deathtouch and lifelink for equip {2}. It is a fine equipment, but it is played in about one Lathliss deck in seven, and it does nothing for the Dragons.

Dragon's Fire costs {1}{R} at instant speed: it deals 3 damage to a creature or planeswalker, but if you choose a Dragon you control it deals damage equal to that Dragon's power instead. With a 5/5 Dragon token that is five damage for two mana.

Swap 3 of 14
Hit the Mother Lode
Cut
Hit the Mother Lode
Sorcery · 4RRR
Inclusion13%
Synergy9%
Lift3.3×
Oracle score 11
Sarkhan's Triumph
Add
Sarkhan's Triumph
Instant · 2R
Inclusion43%
Synergy41%
Lift8.0×+
Oracle score 42

Hit the Mother Lode costs {4}{R}{R}{R}, seven mana, and discovers 10 at random. It is played in about one Lathliss deck in eight.

Sarkhan's Triumph costs {2}{R} at instant speed and searches for the Dragon of your choice: Lathliss herself, or a cheap Dragon on turn three. It turns a seven-mana gamble into a three-mana tutor.

Swap 4 of 14
Anger
Cut
Anger
Creature — Incarnation · 3R
Inclusion21%
Synergy9%
Lift1.7×
Oracle score 14
Verix Bladewing
Add
Verix Bladewing
Legendary Creature — Dragon · 2RR
Inclusion16%
Synergy16%
Lift8.0×+
Oracle score 16

Anger is a 4-mana creature with haste, and it gives your creatures haste from the graveyard if you control a Mountain. It is played in about one Lathliss deck in five and it is not a Dragon.

Verix Bladewing is a 4/4 flying Dragon for {2}{R}{R}. With kicker {3} it also creates Karox Bladewing, a 4/4 flying Dragon token. Verix triggers Lathliss when he enters, and the kicked version brings two bodies.

Swap 5 of 14
Count on Luck
Cut
Count on Luck
Enchantment · RRR
Inclusion18%
Synergy11%
Lift2.5×
Oracle score 14
Sarkhan, Fireblood
Add
Sarkhan, Fireblood
Legendary Planeswalker — Sarkhan · 1RR
Inclusion40%
Synergy38%
Lift8.0×+
Oracle score 39

Count on Luck costs {R}{R}{R} and exiles the top card of your library each upkeep for you to play that turn. It is slow, and it is played in about one Lathliss deck in six.

Sarkhan, Fireblood costs {1}{R}{R}. One +1 loots, the other adds two mana of any colours that can only be spent on Dragon spells, and his -7 creates four 5/5 flying Dragon tokens. A three-mana planeswalker that ramps your Dragons every turn.

Swap 6 of 14
Chandra's Ignition
Cut
Chandra's Ignition
Sorcery · 3RR
Inclusion22%
Synergy13%
Lift2.3×
Oracle score 17
Thundermaw Hellkite
Add
Thundermaw Hellkite
Creature — Dragon · 3RR
Inclusion19%
Synergy18%
Lift8.0×+
Oracle score 18

Chandra's Ignition has a target creature you control deal damage equal to its power to each other creature and each opponent. It also hits your own Dragons.

Thundermaw Hellkite is a 5/5 flying Dragon with haste for {3}{R}{R}. When it enters it deals 1 damage to each flier your opponents control and taps them. A Dragon that triggers Lathliss and attacks the turn it arrives.

Swap 7 of 14
Bitter Reunion
Cut
Bitter Reunion
Enchantment · 1R
Inclusion18%
Synergy15%
Lift5.7×
Oracle score 16
Reckless Barbarian
Add
Reckless Barbarian
Creature — Dragon Barbarian · 1R
Inclusion30%
Synergy27%
Lift8.0×+
Oracle score 28

Bitter Reunion discards a card to draw two and can be sacrificed to give your creatures haste. It does not add to the board.

Reckless Barbarian is a 2/2 Dragon Barbarian for {1}{R}. You can sacrifice it for {R}{R}, so it is a cheap Dragon that triggers Lathliss and pays for the next one.

Swap 8 of 14
Commander's Sphere
Cut
Commander's Sphere
Artifact · 3
Inclusion22%
Synergy14%
Lift3.0×
Oracle score 17
Patron of the Arts
Add
Patron of the Arts
Creature — Dragon Noble · 2R
Inclusion21%
Synergy18%
Lift6.9×
Oracle score 19

Commander's Sphere is a three-mana rock that taps for one mana of your commander's colours, and the deck has eight other mana rocks, plus 38 lands.

Patron of the Arts is a 3/1 Dragon Noble for {2}{R}. It creates a Treasure when it enters and again when it dies, so it triggers Lathliss and gives you two Treasures for three mana.

Swap 9 of 14
Forgotten Cave
Cut
Forgotten Cave
Land
Inclusion32%
Synergy16%
Lift2.0×
Oracle score 23
Maelstrom of the Spirit Dragon
Add
Maelstrom of the Spirit Dragon
Land
Inclusion29%
Synergy28%
Lift8.0×+
Oracle score 28

Forgotten Cave enters tapped, cycles for {R}, and taps for {R}.

Maelstrom of the Spirit Dragon taps for {C}, or for one mana of any colour spent only on Dragon spells. For {4}, a tap and a sacrifice it searches your library for any Dragon card, so it is a land that pays for a Dragon and then finds one.

Swap 10 of 14
Cursed Mirror
Cut
Cursed Mirror
Artifact · 2R
Inclusion37%
Synergy14%
Lift1.6×
Oracle score 23
Sarkhan the Masterless
Add
Sarkhan the Masterless
Legendary Planeswalker — Sarkhan · 3RR
Inclusion19%
Synergy18%
Lift8.0×+
Oracle score 18

Cursed Mirror is a three-mana rock that taps for {R} and can copy a creature until end of turn. It is a ninth rock in a deck that has plenty of mana.

Sarkhan the Masterless costs {3}{R}{R}: whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to it. His +1 turns each planeswalker you control into a 4/4 flying Dragon until end of turn, and his -3 creates a 4/4 flying Dragon token.

Swap 11 of 14
Lightning Bolt
Cut
Lightning Bolt
Instant · R
Inclusion31%
Synergy-5%
Lift0.9×
Oracle score 9
Wrathful Red Dragon
Add
Wrathful Red Dragon
Creature — Dragon · 3RR
Inclusion51%
Synergy48%
Lift8.0×+
Oracle score 49

Lightning Bolt ({R}) is one of the lowest-scoring cards in the precon, at 9 in the Oracle: it is in 30% of Lathliss decks with -6% synergy. It reads: Lightning Bolt deals 3 damage to any target.

Wrathful Red Dragon ({3}{R}{R}) scores 50: it is in 51% of Lathliss decks with 49% synergy. It reads: Flying. Whenever a Dragon you control is dealt damage, it deals that much damage to any target that isn't a Dragon.

Swap 12 of 14
The Elder Dragon War
Cut
The Elder Dragon War
Enchantment — Saga · 2RR
Inclusion14%
Synergy14%
Lift8.0×+
Oracle score 14
Goldspan Dragon
Add
Goldspan Dragon
Creature — Dragon · 3RR
Inclusion55%
Synergy41%
Lift4.0×
Oracle score 47

The Elder Dragon War ({2}{R}{R}) is one of the lowest-scoring cards in the precon, at 14 in the Oracle: it is in 14% of Lathliss decks with 13% synergy. It reads: Read ahead. I : This Saga deals 2 damage to each creature and each opponent. II : Discard any number of cards, then draw that many cards.

Goldspan Dragon ({3}{R}{R}) scores 47: it is in 56% of Lathliss decks with 42% synergy. It reads: Flying, haste. Whenever this creature attacks or becomes the target of a spell, create a Treasure token. Treasures you control have "{T}, Sacrifice this artifact: Add two mana of any one color."

Swap 13 of 14
Chain Reaction
Cut
Chain Reaction
Sorcery · 2RR
Inclusion24%
Synergy11%
Lift1.9×
Oracle score 16
Dracogenesis
Add
Dracogenesis
Enchantment · 6RR
Inclusion39%
Synergy37%
Lift8.0×+
Oracle score 38

Chain Reaction ({2}{R}{R}) is one of the lowest-scoring cards in the precon, at 16 in the Oracle: it is in 23% of Lathliss decks with 11% synergy. It reads: Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

Dracogenesis ({6}{R}{R}) scores 38: it is in 39% of Lathliss decks with 37% synergy. It reads: You may cast Dragon spells without paying their mana costs.

Swap 14 of 14
Outpost Siege
Cut
Outpost Siege
Enchantment · 3R
Inclusion24%
Synergy16%
Lift3.2×
Oracle score 19
Desolation of Smaug
Add
Desolation of Smaug
Sorcery · 2RR
Inclusion34%
Synergy30%
Lift8.0×+
Oracle score 32

Outpost Siege ({3}{R}) is one of the lowest-scoring cards in the precon, at 19 in the Oracle: it is in 24% of Lathliss decks with 16% synergy. It reads: As this enchantment enters, choose Khans or Dragons. • Khans : At the beginning of your upkeep, exile the top card of your library.

Desolation of Smaug ({2}{R}{R}) scores 32: it is in 34% of Lathliss decks with 30% synergy. It reads: Desolation of Smaug deals 3 damage to each non-Dragon creature. Add four mana in any combination of colors. Spend this mana only to cast Dragon spells.

The full swap list

Cut

  • Goddric, Cloaked Reveler
  • Basilisk Collar
  • Hit the Mother Lode
  • Anger
  • Count on Luck
  • Chandra's Ignition
  • Bitter Reunion
  • Commander's Sphere
  • Forgotten Cave
  • Cursed Mirror
  • Lightning Bolt
  • The Elder Dragon War
  • Chain Reaction
  • Outpost Siege

Add

  • Ganax, Astral Hunter
  • Dragon's Fire
  • Sarkhan's Triumph
  • Verix Bladewing
  • Sarkhan, Fireblood
  • Thundermaw Hellkite
  • Reckless Barbarian
  • Patron of the Arts
  • Maelstrom of the Spirit Dragon
  • Sarkhan the Masterless
  • Wrathful Red Dragon
  • Goldspan Dragon
  • Dracogenesis
  • Desolation of Smaug

What to keep

These cards are doing the deck's heavy lifting. Do not cut them.

If you want to spend more

These are strong but sit outside a budget upgrade. Prices are the cheapest paper printing.

The verdict

Reign of Dragons already plays the cost reducers, the damage triggers and the best finishers. The upgrade is more cheap Dragons to trigger Lathliss early, fewer sweepers that hit your own team, and a tutor to find the right Dragon. These fourteen swaps cost about $45 in total.

Want a full 100-card list built around Lathliss, Dragon Queen from today's data?

Build with The Oracle →

Frequently asked questions

What are the best upgrades for the Reign of Dragons precon?

Using data from 5,446 Lathliss decks, the highest-scoring additions are Ganax, Astral Hunter (for Goddric, Cloaked Reveler), Wrathful Red Dragon (for Lightning Bolt) and Goldspan Dragon (for The Elder Dragon War). The full list has 14 swaps, each scored with synergy, inclusion and lift.

How much does it cost to upgrade Reign of Dragons?

All 14 swaps cost about $45.39 at the cheapest paper printings (TCGplayer market prices via Scryfall, 2026-10-27). If you want to spend more, the guide also covers Draconic Visitor ($3.77), Hellkite Tyrant ($1.74) and Stormscale Scion ($2.59).

What should I cut from Reign of Dragons?

The weakest cards for this commander are Goddric, Cloaked Reveler, Basilisk Collar and Lightning Bolt. The guide explains the reason for every cut, and swaps each one for a card that scores higher.

Which cards should I keep in Reign of Dragons?

Keep Dragonlord's Servant, Dragonspeaker Shaman, Dragon Tempest, Scourge of Valkas and Utvara Hellkite. These are the cards doing the deck's heavy lifting.

What does Lathliss do?

Lathliss, Dragon Queen is a six-mana flier. Whenever another nontoken Dragon enters under your control she creates a 5/5 flying Dragon token, and for {1}{R} your Dragons get +1/+0. Every Dragon you cast is two Dragons.

More Foundations Commander upgrade guides

All precon upgrade guides

How the numbers work

Inclusion is the share of Lathliss, Dragon Queen decks (5,446 of them when this was written, 2026-10-27) that play the card. Synergy is how much more often they play it than other decks in the same colours. Oracle score is synergy × 0.6 plus inclusion × 0.4, the same blend The Oracle uses to rank cards for a deck. Lift compares how often the card appears in these decks with how often it could, capped at 8× here; it is shown for context and does not change the score.

Two cautions. Players who run the precon unmodified count as Lathliss decks, which flatters every card the precon contains. Lift is very high for many Dragon cards because they are rarely played outside Dragon decks, so use lift to compare cards, not to judge one in isolation. Prices are the cheapest non-foil paper printing on TCGplayer (via Scryfall), in USD, and move daily.