Ajani's Chosen is a rare Creature — Cat Soldier card from Magic 2014 (M14), collector number 2. Current market price: $0.40 (foil $0.72), TCGplayer market prices via Scryfall.
Whenever an enchantment you control enters, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.