Ajani Goldmane is a rare Legendary Planeswalker — Ajani card from Lorwyn (LRW), collector number 1. Current market price: $12.29 (foil $23.38), TCGplayer market prices via Scryfall.
+1: You gain 2 life. −1: Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn. −6: Create a white Avatar creature token. It has "This token's power and toughness are each equal to your life total."