Ancient Crab

Fortress Crab

Negate

Horseshoe Crab

Purple-Crystal Crab

When Purple-Crystal Crab dies, draw a card.

Island

Vapor Snag

Return target creature to its owner's hand. Its controller loses 1 life.

Unsummon

Return target creature to its owner's hand.

Veteran Armorer

High Alert

Each creature you control assigns combat damage equal to its toughness rather than its power.
Creatures you control can attack as though they didn't have defender.
{2}{W}{U}: Untap target creature.

Riptide Crab

Vigilance
When Riptide Crab dies, draw a card.