Flying. At the beginning of the upkeep, put a +1/+1 counter on Phantasmal Sphere. During your upkeep, pay 1 for each of these +1/+1 counters or bury Phantasmal Sphere. If Phantasmal Sphere leaves play, put an Orb token into play under your opponent's control. Treat this token as a */* blue creature with flying, where * is equal to the number of these +1/+1 counters on Phantasmal Sphere.