Fathom Seer is a common Creature — Illusion card from The List (PLST), collector number C14-109. Current market price: $0.34, 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.