Skelskith, High Tide Tyrant

Defender, Ward—Mill twice X cards, where X is the number of Crabs you control

Other Crabs you control have Vigilance, Islandwalk, and assigns combat damage equal to its toughness rather than its power.

Whenever a nontoken creature or a creature card enters a graveyard from anywhere, create a 0/3 blue Crab creature token.