mtg.wtf

Draw a card.
Bank (If you cast Memory Bank from your hand, exile it until the end of the match. You may cast it from exile during another game this match. It still counts toward your deck minimum.)

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Paradox — Whenever you cast a spell from anywhere other than your hand, Memory Worm deals 2 damage to target player. That player discards a card, then draws a card. Put a +1/+1 counter on Memory Worm.

{T}, Pay 1 life: Add {B}. Spend this mana only to cast an instant or sorcery spell.

Target player shuffles up to three target cards from their graveyard into their library.
Flashback {G}

{T}: Add one mana of any color. Spend this mana only to cast a creature spell.
Whenever you cast a creature spell that doesn't share a creature type with a creature card in your library, draw a card.

When you cast this spell, copy it if you control a planeswalker, Cleric, Druid, Shaman, Warlock, or Wizard.
Scry 1, then draw a card.

Mephit's Enthusiasm deals 4 damage to target creature or planeswalker. If excess damage was dealt this way, note that excess damage, then you get a one-time boon with "When you cast a creature spell, it perpetually gets +X/+0, where X is the noted number."

When Mephitic Draught enters the battlefield or is put into a graveyard from the battlefield, you draw a card and you lose 1 life.

{1}, {T}: Put a winch counter on Mercadian Lift.
{T}, Remove X winch counters from Mercadian Lift: You may put a creature card with mana value X from your hand onto the battlefield.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Mercurial Spelldancer can't be blocked.
Whenever you cast a noncreature spell, put an oil counter on Mercurial Spelldancer.
Whenever Mercurial Spelldancer deals combat damage to a player, you may remove two oil counters from it. If you do, when you next cast an instant or sorcery spell this turn, copy that spell. You may choose new targets for the copy.

Until end of turn, target nonland permanent loses all abilities and becomes your choice of a blue Frog creature with base power and toughness 1/1 or a blue Octopus creature with base power and toughness 4/4.

{T}: Destroy target creature with islandwalk.

When Merfolk Branchwalker enters the battlefield, it explores.

{T}: Draw a card, then discard a card.

{U}, {T}: Target player mills two cards.

Other Merfolk you control get +1/+1.

When Merfolk Observer enters the battlefield, look at the top card of target player's library.

When Merfolk Pupil enters the battlefield, draw a card, then discard a card.
{1}{U}, Exile Merfolk Pupil from your graveyard: Draw a card, then discard a card.

Islandwalk
Phasing

Flying
When Merfolk Skydiver enters the battlefield, put a +1/+1 counter on target creature you control.
{3}{G}{U}: Proliferate.

When Merfolk Traders enters the battlefield, draw a card, then discard a card.

Flash
When Merfolk Trickster enters the battlefield, tap target creature an opponent controls. It loses all abilities until end of turn.

When Merfolk Tunnel-Guide enters the battlefield, you get a three-time boon with "Whenever one or more Merfolk enter the battlefield under your control, target Merfolk creature you control explores."