Pirate Ship

Pirate Ship can't attack unless defending player controls an Island.
{T}: Pirate Ship deals 1 damage to any target.
When you control no Islands, sacrifice Pirate Ship.

Thornwind Faeries

Flying
{T}: Thornwind Faeries deals 1 damage to any target.

Island

Sigil of Sleep

Enchant creature
Whenever enchanted creature deals damage to a player, return target creature that player controls to its owner's hand.

Prodigal Sorcerer

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

Horseshoe Crab

Freed from the Real

Enchant creature
{U}: Tap enchanted creature.
{U}: Untap enchanted creature.

Rewind

Counter target spell. Untap up to four lands.

Mana Leak

Counter target spell unless its controller pays {3}.

Disruptive Student

{T}: Counter target spell unless its controller pays {1}.

Rootwater Hunter

{T}: Rootwater Hunter deals 1 damage to any target.

Curiosity

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Miscalculation

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

Insight

Whenever an opponent casts a green spell, you draw a card.

Hermetic Study

Enchant creature
Enchanted creature has "{T}: This creature deals 1 damage to any target."