Skipp, Timestream Manipulator

{t}: Add {X}, where X can’t be 0. Spend this mana only to cast a single spell. When you cast a spell this way, exile it and put X time counters on it. If it doesn’t have suspend, it gains suspend. At the beginning of each endstep, if you cast three or more spells this turn, put a +1/+1 counter on Skipp.