Commander creatures you own have "The first Dragon spell you cast each turn costs {2} less to cast."

{4}{G}, {T}: Roll a d8. Reveal cards from the top of your library until you reveal a creature card with mana value equal to the result. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Whenever you cast a creature spell, draw a card.

Whenever one or more creatures you control deal combat damage to a player, you may sacrifice one of them. If you do, reveal cards from the top of your library until you reveal a creature card that shares a creature type with the sacrificed creature. Put that card onto the battlefield and the rest on the bottom of your library in a random order.

Trample Whenever a source you control deals 5 or more damage to a player, draw a card.

Flying Whenever Dragonhawk enters or attacks, exile the top X cards of your library, where X is the number of creatures you control with power 4 or greater. You may play those cards until your next end step. At the beginning of your next end step, Dragonhawk deals 2 damage to each opponent for each of those cards that are still exiled.

As an additional cost to cast this spell, discard a card. Draw two cards. Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost and any additional costs. Then exile it.)

When this enchantment enters, if you control a creature with power 4 or greater, draw a card. Creatures you control have trample. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.) Whenever a creature you control with power 4 or greater enters, draw a card.

Draw a card for each creature you control. Ferocious — You gain 4 life for each creature you control with power 4 or greater.

When this enchantment enters and whenever you cast a spell with mana value 5 or greater, draw a card.

As this artifact enters, choose a creature type. Creatures you control of the chosen type get +1/+1. Whenever you cast a creature spell of the chosen type, draw a card.

(Gain the next level as a sorcery to add its ability.) If you would roll one or more dice, instead roll that many dice plus one and ignore the lowest roll. {1}{R}: Level 2 Whenever you roll one or more dice, target creature you control gets +2/+0 and gains menace until end of turn. {2}{R}: Level 3 Creatures you control have haste.

Target creature gains double strike until end of turn. When you roll a natural 20, return this card from your graveyard to your hand. (A natural 20 is a roll that displays 20 on the die.)

Whenever Skanos Dragonheart attacks, it gets +X/+X until end of turn, where X is the greatest power among other Dragons you control and Dragon cards in your graveyard. Choose a Background (You can have a Background as a second commander.)

When this creature dies, you may search your library for a Dragon card, reveal it, put it into your hand, then shuffle.

(Gain the next level as a sorcery to add its ability.) When this Class enters, create two tapped Treasure tokens. {1}{R}: Level 2 Treasures you control have "{T}, Sacrifice this artifact: Add two mana of any one color." {4}{R}: Level 3 Whenever you cast a spell, if mana from a Treasure was spent to cast it, this Class deals damage equal to that spell's mana value to each opponent.

{T}: Add {R}. If that mana is spent on a Dragon creature spell, it gains haste until end of turn.

{T}, Remove a component counter from this artifact: Add two mana of different colors. {T}: Roll a d20. 1—9 | Put a component counter on this artifact. 10—20 | Put two component counters on this artifact.

Whenever a Dragon you control enters, put a gold counter on this artifact. {T}, Remove a gold counter from this artifact: Draw a card. {T}: Add one mana of any color.

Dragon spells you cast cost {1} less to cast.

Dragon spells you cast cost {2} less to cast.

When this creature enters, search your library for up to two basic land cards and reveal them, then roll a d20. 9 or less | Put those cards into your hand, then shuffle. 10—19 | Put one of those cards onto the battlefield tapped and the other into your hand, then shuffle. 20+ | Put those cards onto the battlefield tapped, then shuffle.

Green spells you cast cost {1} less to cast.

You may play an additional land this turn. Draw a card.

Flying Whenever Ganax or another Dragon you control enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Choose a Background (You can have a Background as a second commander.)

Each spell you cast that's red or green costs {1} less to cast.

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."

Whenever this creature attacks, roll a d20. 1—9 | Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") 10—19 | Create two Treasure tokens. 20 | Create three Treasure tokens.

{T}: Add {G}. When you spend this mana to cast a Dragon creature spell, it enters with an additional +1/+1 counter on it and gains hexproof until your next turn. (It can't be the target of spells or abilities your opponents control.)

Menace Pack tactics — Whenever this creature attacks, if you attacked with creatures with total power 6 or greater this combat, you may put a Dragon creature card from your hand onto the battlefield tapped and attacking.

{1}, {T}: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons. {R}, {T}, Sacrifice this artifact: Look at the top seven cards of your library. You may reveal a Dragon card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying Whenever this creature attacks, add {R}{R}{R}{G}{G}{G}. Until end of turn, you don't lose this mana as steps and phases end.

{T}: Add {G}. When you spend this mana to cast a Dragon creature spell, you gain 2 life.

{T}: Add {C}{C}.

When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Whenever you attack, you may sacrifice one or more Treasures. When you do, up to that many target creatures gain double strike until end of turn.

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.

Flying, trample Whenever a Dragon you control attacks, it gains double strike until end of turn.

This spell costs {X} less to cast, where X is the total mana value of Dragons you control. Flying, trample {2}{G}, Sacrifice a land: Return this card from your graveyard to your hand.

({T}: Add {R} or {G}.) This land enters tapped unless you control two or more basic lands.

{T}: Add {C}. {1}, {T}: Put a storage counter on this land. {T}, Remove X storage counters from this land: Add X mana in any combination of colors. Spend this mana only to cast Dragon spells or activate abilities of Dragons.

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

({T}: Add {G}.)

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{G}.

{T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a Dragon creature spell. {2}, {T}, Sacrifice this land: Return target Dragon creature card or Ugin planeswalker card from your graveyard to your hand.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {R} or {G}.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. {T}: Add {G}. {G}, {T}: You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.

({T}: Add {R}.)

This land enters tapped unless you control a Mountain or a Forest. {T}: Add {R} or {G}.

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped. {T}: Add {R}. {R}, {T}: You may play the exiled card without paying its mana cost if an opponent was dealt 7 or more damage this turn.

Cast this spell only before combat or during combat before blockers are declared. Roll two d20 and ignore the lower roll. 1—14 | Choose any number of creatures. They block this turn if able. 15—20 | You choose which creatures block this turn and how those creatures block.

As an additional cost to cast this spell, you may reveal a Dragon card from your hand or choose a Dragon you control. Dragon's Fire deals 3 damage to target creature or planeswalker. If you revealed a Dragon card or chose a Dragon as you cast this spell, Dragon's Fire deals damage equal to the power of that card or creature instead.

Roll two d12 and choose one result. Reckless Endeavor deals damage equal to that result to each creature. Then create a number of Treasure tokens equal to the other result.

+1: Creatures you control get +1/+1 and gain haste until end of turn. −2: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. −6: Create five 4/4 red Dragon creature tokens with flying.

Flying Whenever this creature or another Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control. {R}: This creature gets +1/+0 until end of turn.

Flying Whenever this creature deals combat damage to a player, roll a d20. When you do, put X +1/+1 counters on each of up to two target creatures, where X is the result.

Creature spells you control can't be countered. Nontoken creatures you control have riot. (They enter with your choice of a +1/+1 counter or haste.)

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature. +1: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying. −3: Create a 4/4 red Dragon creature token with flying.

At the beginning of your upkeep, if you control six or more lands, create a 5/5 red Dragon creature token with flying.

Flying Whenever a Dragon you control attacks, create a 6/6 red Dragon creature token with flying.