Islandwalk (This creature is unblockable as long as defending player controls an Island.), swampwalk (This creature is unblockable as long as defending player controls a Swamp.) Whenever Wrexial, the Risen Deep deals combat damage to a player, you may cast target instant or sorcery card from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.