Gloryheath Lynx is a uncommon Creature — Cat Mount card from Aetherdrift (DFT), collector number 14. Current market price: $0.25 (foil $0.34), TCGplayer market prices via Scryfall.
Lifelink Whenever this creature attacks while saddled, search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. Saddle 2 (Tap any number of other creatures you control with total power 2 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)