Ancient Weapon Poseidon is a 1-cost Green event from A Fist of Divine Speed (OP11-037), C rarity. Tracked TCGPlayer market price: $0.11 as of 2026-06-18. Effect: [Main] Look at 4 cards from the top of your deck; reveal up to 1 {Neptunian} or {Fish-Man Island} type Character card and add it to your hand. Then, place the rest at the bottom of your deck in any order. [Trigger] Draw 1 card. Fish-Man Island