Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)

You can't lose the game this turn and your opponents can't win the game this turn. Until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead.

{T}: Add one mana of any color in your commander's color identity.

Azorius Chancery enters the battlefield tapped.

When Azorius Chancery enters the battlefield, return a land you control to its owner's hand.

{T}: Add {W}{U}.

{1}, {T}: Add {W}{U}.

{T}: Add {C}.

{T}: Add {R} or {W}. Battlefield Forge deals 1 damage to you.

Equipped creature gets +1/+1 for each land you control.

Equip legendary creature {3}

Equip {7}

Choose one --

• Boros Charm deals 4 damage to target player or planeswalker.

• Permanents you control gain indestructible until end of turn.

• Target creature gains double strike until end of turn.

Boros Garrison enters the battlefield tapped.

When Boros Garrison enters the battlefield, return a land you control to its owner's hand.

{T}: Add {R}{W}.

{1}, {T}: Add {R}{W}.

Choose one --

• Cathartic Pyre deals 3 damage to target creature or planeswalker.

• Discard up to two cards, then draw that many cards.

Celestial Colonnade enters the battlefield tapped.

{T}: Add {W} or {U}.

{3}{W}{U}: Until end of turn, Celestial Colonnade becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

Creatures you control gain indestructible. Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

Clifftop Retreat enters the battlefield tapped unless you control a Mountain or a Plains.

{T}: Add {R} or {W}.

Mutate {3}{R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Reach

Whenever this creature mutates, you may discard a card. If you do, draw a card.

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Draw a card.

Mutate {2}{W}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Lifelink

Whenever this creature mutates, create two 1/1 white Cat creature tokens with lifelink.

Choose one --

• Prevent all combat damage that would be dealt this turn.

• Regenerate target creature.

• Counter target spell that targets you.

Draw a card. Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, Deflecting Palm deals that much damage to that source's controller.

As an additional cost to cast this spell, sacrifice an artifact or discard a card.

Draw two cards.

Each player who controls a multicolored creature draws a card. Then destroy all creatures.

This spell can't be countered.

Counter target noncreature spell.

Return target creature to its owner's hand. You gain 2 life.

Mutate {3}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying

Whenever this creature mutates, draw a card.

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.)

Mutate {3}{R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying

Whenever this creature mutates, create a red artifact token named Feather with "{1}, Sacrifice Feather: Return target Phoenix card from your graveyard to the battlefield tapped."

Return target creature to its owner's hand. If its mana value was 3 or less, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Draw two cards, then discard two cards.

Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

(Gain the next level as a sorcery to add its ability.)

When Fighter Class enters the battlefield, search your library for an Equipment card, reveal it, put it into your hand, then shuffle.

{1}{R}{W}: Level 2

Equip abilities you activate cost {2} less to activate.

{3}{R}{W}: Level 3

Whenever a creature you control attacks, up to one target creature blocks it this combat if able.

Fire Diamond enters the battlefield tapped.

{T}: Add {R}.

Return target nonland permanent to its owner's hand. If you controlled that permanent, draw a card.

Destroy target permanent. Its controller creates a 3/3 green Elephant creature token.

Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.

{T}: Add {W} or {U}.

Prevent all combat damage that would be dealt this turn.

Mutate {2}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, other creatures you control get +X/+X until end of turn, where X is the number of times this creature has mutated.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

Izzet Boilerworks enters the battlefield tapped.

When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand.

{T}: Add {U}{R}.

{1}, {T}: Add {U}{R}.

If Leyline of Anticipation is in your opening hand, you may begin the game with it on the battlefield.

You may cast spells as though they had flash.

Mutate {U/R}{U/R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, return target instant or sorcery card from your graveyard to your hand.

Mutate {3}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Vigilance

Whenever this creature mutates, you gain 4 life.

Marble Diamond enters the battlefield tapped.

{T}: Add {W}.

Equipped creature gets +1/+2 and has hexproof. (It can't be the target of spells or abilities your opponents control.)

Equip {3}

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Mystic Monastery enters the battlefield tapped.

{T}: Add {U}, {R}, or {W}.

Needle Spires enters the battlefield tapped.

{T}: Add {R} or {W}.

{2}{R}{W}: Needle Spires becomes a 2/1 red and white Elemental creature with double strike until end of turn. It's still a land.

Search your library for an Aura or Equipment card, reveal it, put it into your hand, then shuffle.

Scry 1.

Draw a card.

Surveil 3. (Look at the top three cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

Each creature spell you cast costs {1} less to cast if it has mutate.

Whenever you cast a creature spell, if it has mutate, draw a card, then discard a card.

Mutate {2}{R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

{T}: This creature deals X damage to any target, where X is the number of times this creature has mutated.

Mutate {3}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flash

Whenever this creature mutates, you may return target creature an opponent controls to its owner's hand.

Draw two cards.

Mutate {1}{R/W}{R/W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, other creatures you control get +2/+1 until end of turn.

Restless Bivouac enters the battlefield tapped.

{T}: Add {R} or {W}.

{1}{R}{W}: Restless Bivouac becomes a 2/2 red and white Ox creature until end of turn. It's still a land.

Whenever Restless Bivouac attacks, put a +1/+1 counter on target creature you control.

Restless Spire enters the battlefield tapped.

{T}: Add {U} or {R}.

{U}{R}: Until end of turn, Restless Spire becomes a 2/1 blue and red Elemental creature with "As long as it's your turn, this creature has first strike." It's still a land.

Whenever Restless Spire attacks, scry 1.

Destroy all creatures that dealt damage to you this turn.

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Mutate {1}{U} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flash

Whenever this creature deals combat damage to a player, draw a card.

Exile all attacking creatures target player controls. That player may search their library for that many basic land cards, put those cards onto the battlefield tapped, then shuffle.

{T}: Add {C}.

{T}: Add {U} or {R}. Shivan Reef deals 1 damage to you.

Sky Diamond enters the battlefield tapped.

{T}: Add {U}.

Sulfur Falls enters the battlefield tapped unless you control an Island or a Mountain.

{T}: Add {U} or {R}.

Equipped creature gets +4/+0.

{R}{W}, Unattach Sunforger: Search your library for a red or white instant card with mana value 4 or less and cast that card without paying its mana cost. Then shuffle.

Equip {3}

This spell can't be countered.

Destroy all creatures.

Exile target creature. Its controller gains life equal to its power.

{T}: Add {C}.

{T}: Add {R} or {W}. Talisman of Conviction deals 1 damage to you.

{T}: Add {C}.

{T}: Add {U} or {R}. Talisman of Creativity deals 1 damage to you.

{T}: Add {C}.

{T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.

Temple of Enlightenment enters the battlefield tapped.

When Temple of Enlightenment enters the battlefield, scry 1.

{T}: Add {W} or {U}.

Temple of Epiphany enters the battlefield tapped.

When Temple of Epiphany enters the battlefield, scry 1.

{T}: Add {U} or {R}.

Temple of Triumph enters the battlefield tapped.

When Temple of Triumph enters the battlefield, scry 1.

{T}: Add {R} or {W}.

As an additional cost to cast this spell, discard a card.

Draw two cards.

Return target spell or creature to its owner's hand.

Mutate {1}{W/U}{R}{R} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying, first strike

Whenever this creature mutates, you may cast target noncreature card with mana value 3 or less from your graveyard without paying its mana cost.

Choose one --

• Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

• Destroy target creature with toughness 4 or greater.

Flying

Whenever you cast a spell from anywhere other than your hand, draw a card.

Mutate {2}{W} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying

Whenever this creature mutates, put a +1/+1 counter on it.

Wandering Fumarole enters the battlefield tapped.

{T}: Add {U} or {R}.

{2}{U}{R}: Until end of turn, Wandering Fumarole becomes a 1/4 blue and red Elemental creature with "{0}: Switch this creature's power and toughness until end of turn." It's still a land.

Whenever you cast a noncreature spell, draw a card.