Airbender Ascension is a rare Enchantment card from Avatar: The Last Airbender (TLA), collector number 364. Current market price: $2.31 (foil $2.76), TCGplayer market prices via Scryfall.
When this enchantment enters, airbend up to one target creature. Whenever a creature you control enters, put a quest counter on this enchantment. At the beginning of your end step, if this enchantment has four or more quest counters on it, exile up to one target creature you control, then return it to the battlefield under its owner's control.