Vexing Sphinx (Retro) [Dominaria Remastered]

Flying
Cumulative upkeep—Discard a card. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)When Vexing Sphinx is put into a graveyard from the battlefield, draw a card for each age counter on it.