Surge Mare is a uncommon Creature — Horse Fish card from Core Set 2019 (M19), collector number 77. Current market price: $0.19 (foil $0.42), TCGplayer market prices via Scryfall.
This creature can't be blocked by green creatures. Whenever this creature deals damage to an opponent, you may draw a card. If you do, discard a card. {1}{U}: This creature gets +2/-2 until end of turn.