Whenever you attack, up to one target attacking creature can't be blocked this turn. Return that creature to its owner's hand at the beginning of the next end step. Choose a Background (You can have a Background as a second commander.)

When this artifact enters, draw a card. {1}, {T}, Sacrifice this artifact: Target creature can't attack or block this turn.

When this artifact enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle. {2}, {T}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.

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

When this artifact enters, draw a card. {1}, {T}: Add one mana of any color.

This artifact enters tapped. When this artifact enters, draw a card. {2}, {T}, Sacrifice this artifact: Draw a card.

When this creature enters, return target creature to its owner's hand.

When this creature enters, choose one — • Put a +1/+1 counter on this creature. • Search your library for a basic land card, reveal it, then shuffle and put that card on top.

When this creature enters, return target artifact card from your graveyard to your hand.

Flying When this creature enters, 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.)

Flying When this creature enters, choose one — • Put a +1/+1 counter on this creature. • Return target creature to its owner's hand.

When this creature enters, create a 1/1 colorless Thopter artifact creature token with flying.

Flying When this creature enters, put up to one target instant or sorcery card from your graveyard on top of your library.

When this creature enters, create a 0/0 green and blue Fractal creature token. Put a +1/+1 counter on each Fractal you control.

When this creature enters, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this creature enters, put a +1/+1 counter on target creature.

When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.

When this creature enters, put a +1/+1 counter on target creature.

When this creature enters, put a +1/+1 counter on target creature. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

When this creature enters, draw a card.

Devoid (This card has no color.) When this creature enters, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add {C}."

Flying When this creature enters, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

When this creature enters, you gain 2 life. When this creature dies, draw a card.

When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

When this creature enters, draw a card.

Defender When this creature dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

{T}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Kicker {2}{G} (You may pay an additional {2}{G} as you cast this spell.) If this creature was kicked, it enters with two +1/+1 counters on it. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Changeling (This card is every creature type.) When this creature enters, put a +1/+1 counter on target creature.

Whenever this creature or another Ally you control enters, target player mills X cards, where X is the number of Allies you control.

When this creature enters, you may goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Vigilance, trample When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

When this creature enters, return target creature to its owner's hand.

Infesting Spores — When this creature enters, destroy up to one target artifact or enchantment.

When this creature enters, you may put target card from a graveyard on the bottom of its owner's library.

When this creature enters, create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this token: Add {C}."

When this creature enters, choose one — • Put a +1/+1 counter on target creature. • Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

When this creature enters, put a +1/+1 counter on target creature you control. Each creature you control with a +1/+1 counter on it has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.)

When this creature enters, look at the top four cards of your library, then put them back in any order.

When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Flying When this creature enters, create a 1/1 colorless Spirit creature token.

Deathtouch When this creature enters, another target creature you control gains deathtouch until end of turn.

Reach When this creature enters, create a 1/2 green Spider creature token with reach.

Flying When this creature enters, investigate twice. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.") Evoke {G}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

When this creature enters, shuffle the cards from your hand into your library, then draw that many cards.

Enchant creature you control When this Aura enters, draw a card. Enchanted creature gets +1/+1 and has flying.

Exile target creature you control, then return that card to the battlefield under its owner's control. Draw a card.

Return target creature to its owner's hand. Its controller draws a card.

Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.

Draw two cards. You may put a land card from your hand onto the battlefield.

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

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Return target nonland permanent to its owner's hand. Draw a card.

Until end of turn, target creature loses all abilities and becomes a green Snake with base power and toughness 1/1. Draw a card.

({T}: Add {G}.)

Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) Draw a card.

Put a +1/+1 counter on target creature, then proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Destroy target artifact or enchantment. Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Exile target artifact or creature. Its controller creates a 1/1 blue Bird creature token with flying. Foretell {U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)