Killian, Decisive Mentor is a mythic Legendary Creature — Human Warlock card from Secrets of Strixhaven Commander (SOC), collector number 4. Current market price: $0.78 (foil $0.41), TCGplayer market prices via Scryfall.
Whenever an enchantment you control enters, tap up to one target creature and goad it. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Whenever one or more creatures that are enchanted by an Aura you control attack, draw a card.