Vigilance
When Donatello enters, tap up to three target creatures your opponents control. Put a stun counter on each of them.

This spell costs less to cast if you control a Dragon.
Draw three cards.

Devoid
When this creature enters, create two 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this token: Add ."
Sacrifice an Eldrazi Scion: Tap target creature.

Enchant creature
When this Aura enters, draw a card.
Enchanted creature doesn't untap during its controller's untap step.

, : Target creature can't be blocked this turn.
Transmute

Look at the top card of each player's library, then exile those cards face down. You may play them without paying their mana costs for as long as they remain exiled.

Flying
Eerie — Whenever this creature or another enchantment you control enters and whenever you fully unlock a Room, tap up to one target creature and put a stun counter on it.
Stun counters can't be removed from permanents your opponents control. (They won't untap if they have stun counters.)

This creature enters with six +1/+1 counters on it.
This creature can't attack unless defending player controls an Island.
, Remove a +1/+1 counter from this creature: Target land becomes an Island until end of turn.

Draw a card for each Island you control.

Assist (Another player can pay up to of this spell's cost.)
Each player shuffles their hand and graveyard into their library, then draws seven cards. Exile Game Plan.

This creature can't attack unless defending player controls an Island.
Whenever this creature blocks or becomes blocked by a creature that has been dealt damage this turn, this creature gets +2/+0 and gains trample until end of turn.
When you control no Islands, sacrifice this creature.

, Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of those cards into your hand and the rest into your graveyard.
Partner

This creature can't attack unless defending player controls an enchantment or an enchanted permanent.

Gain control of target monocolored creature.
Forecast — , Reveal this card from your hand: Target creature becomes the color or colors of your choice until end of turn.

This creature can't be blocked unless defending player controls three or more creatures that share a creature type.

Vigilance
When Happy Hogan enters, the owner of target creature an opponent controls puts it into their library second from the top or on the bottom.

Whenever this creature attacks, return another creature you control to its owner's hand.

Whenever a player casts an instant or sorcery spell, each other player copies that spell. Each of those players may choose new targets for their copy.

Flying
When this creature enters, scry 2.

When this creature enters, return up to one other target creature to its owner's hand. If you controlled it, investigate.

Enchant creature
When this Aura enters attached to a creature, each other nontoken creature you control becomes a copy of that creature.
Nontoken creatures you control enter as a copy of enchanted creature.

Scry 3, then reveal the top card of your library. Draw cards equal to that card's mana value.

Affinity for artifacts
Return target artifact to its owner's hand.

Flying
When this creature enters, detain target creature an opponent controls.

: Until end of turn, this creature gets -1/-1 and gains your choice of double strike, protection from red, vigilance, or shadow.

Improvise
Ward
Whenever this creature or another artifact you control enters, put a +1/+1 counter on this creature. It can't be blocked this turn.

Flying
When Keiga dies, gain control of target creature.

When this creature enters, proliferate.

When Marina Vendrell's Grimoire enters, if you cast it, draw five cards.
You have no maximum hand size and don't lose the game for having 0 or less life.
Whenever you gain life, draw that many cards.
Whenever you lose life, discard that many cards. Then if you have no cards in hand, you lose the game.