Tangletrove Kelp is a rare Artifact Creature — Clue Plant card from Murders at Karlov Manor Commander (MKC), collector number 334. Current market price: $0.67, TCGplayer market prices via Scryfall.
Ward {2} At the beginning of each combat, other Clues you control become 6/6 Plant creatures in addition to their other types until end of turn. {2}, Sacrifice this creature: Draw a card.