War Barge is a uncommon Artifact card from The Dark (DRK), collector number 115. Current market price: $1.06, TCGplayer market prices via Scryfall.
{3}: Target creature gains islandwalk until end of turn. When this artifact leaves the battlefield this turn, destroy that creature. A creature destroyed this way can't be regenerated. (A creature with islandwalk can't be blocked as long as defending player controls an Island.)