Bounding Felidar is a uncommon Creature — Cat Beast Mount card from Outlaws of Thunder Junction (OTJ), collector number 5. Current market price: $0.21 (foil $0.29), TCGplayer market prices via Scryfall.
Whenever this creature attacks while saddled, put a +1/+1 counter on each other creature you control. You gain 1 life for each of those creatures. 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.)