Ajani, Sleeper Agent is a mythic Legendary Planeswalker — Ajani card from Dominaria United (DMU), collector number 371. Current market price: $2.24 (foil $2.17), TCGplayer market prices via Scryfall.
Compleated ({G/W/P} can be paid with {G}, {W}, or 2 life. If life was paid, this planeswalker enters with two fewer loyalty counters.) +1: Reveal the top card of your library. If it's a creature or planeswalker card, put it into your hand. Otherwise, you may put it on the bottom of your library. −3: Distribute three +1/+1 counters among up to three target creatures. They gain vigilance until end of turn. −6: You get an emblem with "Whenever you cast a creature or planeswalker spell, target opponent gets two poison counters."