Kalamax' Casting Cost

Whenever you cast Kalamax, the Stormsire from your command zone, put two cast counters on Kalamax' Casting Cost. As an additional cost to cast Kalamax, the Stormsire, pay {x}, where {x} is the number
of cast counters on Kalamax' Casting Cost.
Untap, Upkeep, Draw, Attack, Go.