name: Jötun Owl Keeper
printings: CSP, PLST
text: 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.
type: Creature — Giant