Fathom Seer is a common Creature — Illusion card from Masters 25 (A25), collector number 56. Current market price: $0.22 (foil $0.08), TCGplayer market prices via Scryfall.
Morph—Return two Islands you control to their owner's hand. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, draw two cards.