mtg.wtf

When you unlock this door, create an X/X blue Spirit creature token with flying, where X is the number of unlocked doors among Rooms you control.

When you unlock this door, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Search another target player's library for a card and put that card into your hand. Then shuffle that player's library.

Search your library for a card and put it into another target player's hand. Then shuffle your library.

Target creature gets -1/-1 until end of turn.

Any number of target creatures you control phase out.
Fuse

Flip a coin. If it comes up heads, counter target instant or sorcery spell. If it comes up tails, copy that spell and you may choose new targets for the copy.

Exile target attacking creature.

Target player discards a card.

When you unlock this door, exile the top two cards of your library. You may play them until the end of your next turn.

Whenever one or more cards are put into your graveyard from your library, each opponent loses 1 life for each card type among those cards.

Creatures you control have base power and toughness each equal to the number of creatures you control.

Creatures you control get +1/+1 until end of turn.
Fuse

At the beginning of your upkeep, surveil 1. You win the game if there are eight or more different names among unlocked doors of Rooms you control.

Untap each creature you control during each other player's untap step.

Target creature gets +2/+4 until end of turn.
Fuse

Put up to two target creature cards from a single graveyard onto the battlefield under your control. They gain haste until end of turn. Sacrifice them at the beginning of the next end step.

Destroy each artifact, creature, and enchantment with mana value X.

Destroy target multicolored permanent.

Destroy target tapped creature.

Creatures you control gain indestructible until end of turn. Untap each creature you control.
Fuse

Destroy target artifact.

Each player sacrifices an artifact, a creature, an enchantment, a land, and a planeswalker of their choice.
Fuse

Create a token that's a copy of target creature you control.

Counter target activated or triggered ability.