Whenever you attack, you may sacrifice another creature or an artifact. If you do, create a 4/1 black Skeleton creature token with menace that's tapped and attacking. (It can't be blocked except by two or more creatures.) Choose a Background (You can have a Background as a second commander.)

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

As an additional cost to cast this spell, sacrifice a permanent. Exile target artifact, creature, or enchantment.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")

Flash {1}, Sacrifice this creature: Destroy target artifact or enchantment.

Changeling (This card is every creature type.) Exile target creature. Its controller creates a 1/1 colorless Shapeshifter creature token with changeling.

When this creature enters, choose one — • Cure Wounds — You gain 2 life. • Dispel Magic — Destroy target enchantment. • Gentle Repose — Exile target card from a graveyard.

Galvanic Blast deals 2 damage to any target. Metalcraft — Galvanic Blast deals 4 damage instead if you control three or more artifacts.

Lightning Bolt deals 3 damage to any target.

Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, it gets +0/+2 until end of turn. {1}, Sacrifice this creature: Destroy target artifact or enchantment.

Skred deals damage to target creature equal to the number of snow permanents you control.

({W/P} can be paid with either {W} or 2 life.) Target artifact or creature you control gains protection from artifacts or from the color of your choice until end of turn.

Target permanent gains hexproof and indestructible until end of turn. If it's an artifact creature, it gets +2/+2 until end of turn.

Put a shield counter on target creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.) Scry 1.

Choose one — • Prevent all combat damage that would be dealt this turn. • Regenerate target creature. • Counter target spell that targets you.

Target creature you control gains protection from the color of your choice until end of turn. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Sacrifice a creature: Regenerate target creature.

Target creature you control gains protection from the color of your choice until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything of that color.) Scry 1.

Target artifact or creature gains hexproof and indestructible until end of turn. Scry 1.

Return target artifact or creature card with mana value 3 or less from your graveyard to the battlefield. If a creature enters this way, it enters with an additional +1/+1 counter on it.

Choose one or both — • Return target creature card from your graveyard to your hand. • Return target artifact card from your graveyard to your hand.

Populate. Creatures you control gain indestructible until end of turn. (To populate, create a token that's a copy of a creature token you control.)

Target creature you control gains protection from the color of your choice until end of turn. Draw a card.

Sacrifice this creature: Prevent all combat damage that would be dealt this turn.

Prevent all damage that sources of the color of your choice would deal this turn. Flashback—Tap an untapped white creature you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Whenever another creature enters, you gain 1 life.

{1}, {T}, Sacrifice this artifact: Add one mana of any color. When this artifact is put into a graveyard from the battlefield, draw a card.

Haste When this creature dies, exile the top card of your library. You may play it until the end of your next turn.

{1}, Sacrifice a creature: Exile the top card of your library. You may play that card this turn. (You still pay its costs. You can play a land this way only if you have an available land play remaining.)

When this artifact enters or leaves the battlefield, exile the top card of your library. Until end of turn, you may play that card. {2}{R}, Sacrifice this artifact: Create a 2/2 white Samurai creature token with vigilance. Activate only as a sorcery.

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.)

Exile the top three cards of your library. You may play those cards this turn. At the beginning of the next end step, if any of those cards remain exiled, put them into your graveyard, then create a 0/1 colorless Eldrazi Spawn creature token for each card put into your graveyard this way. Those tokens have "Sacrifice this token: Add {C}."

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

When this artifact enters or is put into a graveyard from the battlefield, draw a card.

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

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

When this creature enters, draw a card.

This artifact enters tapped. {2}, {T}, Sacrifice this artifact: Add two mana in any combination of colors. When this artifact is put into a graveyard from the battlefield, draw a card.

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

When this creature enters, it deals 1 damage to each opponent. Create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")

This artifact enters tapped. {X}, {T}, Sacrifice this artifact: Add X mana in any combination of colors. When this artifact is put into a graveyard from the battlefield, draw a card.

When this artifact enters and when you sacrifice it, create a 1/1 white Rabbit creature token and scry 1. (Look at the top card of your library. You may put that card on the bottom.) {2}, {T}, Sacrifice this artifact: You gain 3 life.

When this creature dies, create a 1/1 white Spirit creature token with flying.

When this creature dies, create a 1/1 white Human Soldier creature token.

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.) {1}{R}: Creatures you control named Genasi Enforcers get +1/+0 until end of turn.

First strike When this creature dies, amass Zombies 1. (Put a +1/+1 counter on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)

When this creature dies, create a 1/1 white Soldier creature token with lifelink.

As an additional cost to cast this spell, sacrifice an artifact. Create three 1/1 red Goblin creature tokens.

Echo {1}{R} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters or dies, create a 1/1 red Goblin creature token.

When this artifact enters or is put into a graveyard from the battlefield, create a 1/1 colorless Construct artifact creature token.

({T}: Add {R} or {W}.) This land enters tapped.

{T}: Add {W}.

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

Indestructible {T}: Add {C}.

{T}: Add {R}.

This land enters tapped. Indestructible {T}: Add {R} or {W}.

({T}: Add {R}.)

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

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

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

This artifact enters tapped. {T}: Add {R}.

When this creature dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Encore {3}{R} ({3}{R}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

This artifact enters tapped. {T}: Add {W}.

{T}: Add {C}. {1}, {T}, Sacrifice this artifact: Draw a card.

When this artifact enters or is put into a graveyard from the battlefield, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

When this artifact enters or is put into a graveyard from the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")