Inkwell Leviathan is a rare Artifact Creature — Leviathan card from Double Masters (2XM), collector number 55. Current market price: $0.78 (foil $0.78), TCGplayer market prices via Scryfall.
Trample Islandwalk (This creature can't be blocked as long as defending player controls an Island.) Shroud (This creature can't be the target of spells or abilities.)