Creature — Giant
Jötun Owl Keeper
Cumulative upkeep {W} or {U} (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 this creature dies, create a 1/1 white Bird creature token with flying for each age counter on it.
From Magic: The Gathering.
Exact printings
Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o4jk7256vpb1hb0vt2g6r.