mtg.wtf

Devoid
When Murk Strider enters, you may put a card an opponent owns from exile into that player's graveyard. If you do, return target creature to its owner's hand.

Other green creatures you control get +1/+1.
Other blue creatures you control get +1/+1.
Untap all green and/or blue creatures you control during each other player's untap step.

Delve
Flying
Murktide Regent enters with a +1/+1 counter on it for each instant and sorcery card exiled with it.
Whenever an instant or sorcery card leaves your graveyard, put a +1/+1 counter on Murktide Regent.

{T}: Add {B}.

Murky Sewer enters tapped unless a player has 13 or less life.
{T}: Add {U} or {B}.

Birds you control get +1/+1 and have vigilance.
At the beginning of your end step, for each spell you've cast this turn, create a 1/2 blue Bird creature token with flying named Storm Crow.

As Murmuring Bosk enters, you may reveal a Treefolk card from your hand. If you don't, Murmuring Bosk enters tapped.
{T}: Add {W} or {B}. Murmuring Bosk deals 1 damage to you.

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Defender

Reveal the top three cards of your library. An opponent chooses one of them. Put that card into your graveyard and the rest into your hand.

Target creature gets +X/+X until end of turn, where X is 3 plus the number of cards named Muscle Burst in all graveyards.

All Sliver creatures get +1/+1.

Flying
When Muse Drake enters, draw a card.

{3}, {T}: Target player exiles a card from their hand. Activate only as a sorcery.
{1}: Choose a card exiled with Muse Vessel. You may play that card this turn.

Exile the top X cards of your library. You may cast an instant or sorcery spell with mana value X or less from among them without paying its mana cost. Then put the exiled instant and sorcery cards that weren't cast this way into your hand and the rest on the bottom of your library in a random order.

When Museum Nightwatch dies, create a 2/2 white and blue Detective creature token.
Disguise {1}{W}

Sacrifice a Food: Put a +1/+1 counter on Mushroom Watchdogs. It gains vigilance until end of turn. Activate only as a sorcery.

Cumulative upkeep {1}
{T}: Put a music counter on target creature. If it doesn't have "At the beginning of your upkeep, destroy this creature unless you pay {1} for each music counter on it," it gains that ability.

Haste
Whenever Must Be Knights attacks, if defending player controls an Enchanting Tale, Must Be Knights deals damage equal to its power to any target. (Enchanting Tales have the expansion code WOT. Other versions of them don't count.)

When Muster the Departed enters, create a 1/1 white Spirit creature token with flying.
Morbid — At the beginning of your end step, if a creature died this turn, populate.

Flying, vigilance
Mutagen Connoisseur gets +1/+0 for each transformed permanent you control.

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

Trample
Warp Vortex — When Mutalith Vortex Beast enters, flip a coin for each opponent you have. For each flip you win, draw a card. For each flip you lose, Mutalith Vortex Beast deals 3 damage to that player.

Target creature you control with a +1/+1 counter on it fights target creature an opponent controls.

Devoid
When you cast this spell, remove all counters from up to one target permanent or opponent. The next spell you cast this turn costs {1} less to cast for each counter removed this way.
Deathtouch