Archelos, Lagoon Mystic is a rare Legendary Creature — Turtle Shaman card from Commander Legends (CMR), collector number 268. Current market price: $0.33 (foil $0.59), TCGplayer market prices via Scryfall.
As long as Archelos is tapped, other permanents enter tapped. As long as Archelos is untapped, other permanents enter untapped.