MTG

{U}: Sea Spirit gets +1/+0 until end of turn.

Sea Serpent can't attack unless defending player controls an Island. When you control no Islands, sacrifice Sea Serpent.

Counter target creature spell.

Whenever Reef Pirates deals damage to an opponent, that player puts the top card of their library into their graveyard.

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.

Enchant land Whenever enchanted land becomes tapped, Psychic Venom deals 2 damage to that land's controller.

{T}: Prodigal Sorcerer deals 1 damage to any target.

Counter target spell unless its controller pays {X}. If that player doesn't, they tap all lands with mana abilities they control and lose all unspe...

You gain 1 life. Draw a card at the beginning of the next turn's upkeep.

Flying

Enchant land As Phantasmal Terrain enters the battlefield, choose a basic land type. Enchanted land is the chosen type.

Flying At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay {U}.

{1}{U}, {T}: Untap target artifact an opponent controls and gain control of it until end of turn. It gains haste until end of turn. When you lose c...

Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwal...

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you c...

Flying, protection from red

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Regenerate target creature.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.