
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Segovian Leviathan has 6 printings, first in Legends (1994). EDHREC ranks it #28,205 among Commander cards. It appears most in Graviton, Fundamental Force decks (1 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.