Aeon Chronicler is a rare Creature — Avatar card from Duel Decks: Jace vs. Vraska (DDM), collector number 17. Current market price: $0.26, TCGplayer market prices via Scryfall.
Aeon Chronicler's power and toughness are each equal to the number of cards in your hand. Suspend X—{X}{3}{U}. X can't be 0. Whenever a time counter is removed from this card while it's exiled, draw a card.