Spooky20

River Sneak can't be blocked. Whenever another Merfolk enters the battlefield under your control, River Sneak gets +1/+1 until end of turn.

When Elite Instructor enters the battlefield, draw a card, then discard a card.

{U}: Untap Horseshoe Crab.

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your gr...

Flying Heroic — Whenever you cast a spell that targets Chorus of the Tides, scry 1. (To scry 1, look at the top card of your library, then you may ...

Flash When Brinebarrow Intruder enters the battlefield, target creature an opponent controls gets -2/-0 until end of turn.

Creatures your opponents control get -1/-0. {1}{U}, Discard Waker of Waves: Look at the top two cards of your library. Put one of them into your ha...

Whenever you draw a card, you may pay {1}. When you do, you may tap or untap target creature.

When Teferi's Tutelage enters the battlefield, draw a card, then discard a card. Whenever you draw a card, target opponent mills two cards. (They p...

Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Whenever Cold-Eyed Selkie deals combat damage to a play...

Whenever you cast an instant spell, you may pay {1}. If you do, draw a card.

Until end of turn, target creature becomes a blue Serpent with base power and toughness 4/4. Cycling {1} ({1}, Discard this card: Draw a card.)

Counter target spell. Cycling {2} ({2}, Discard this card: Draw a card.)

Creatures your opponents control get -2/-0 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.)

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step. Cycling {1} ({1}, Discard this card: Draw a ...

Flying Cycling {2}{U} ({2}{U}, Discard this card: Draw a card.) When you cycle Avian Oddity, put a flying counter on target creature you control.

Flying At the beginning of your upkeep, sacrifice Arcades Sabboth unless you pay {G}{W}{U}. Each untapped creature you control gets +0/+2 as long a...

Change the target of target spell with a single target.

When this creature attacks or blocks, at end of combat, sacrifice it and it deals 5 damage to you. {2}{U}{U}, {T}: Return target permanent that isn...

Create a token that's a copy of target creature you control. Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. T...

{T}: Add {U}. Spend this mana only to cast an instant or sorcery spell or a kicked spell.

Enchant land (Target a land as you cast this. This card enters attached to that land.) Enchanted land is an Island.