Vaethyn, Vortex Elementalist

Whenever you cast a sorcery spell create X 3/1 red Elemental creature tokens, where X is the spell's converted mana cost.
Whenever you cast an instant spell, create X 0/0
blue Elemental creature tokens, where X is twice
the spell's converted mana cost.
Elemental creatures you control get +1/+1.
At the beginning of your upkeep, sacrifice three elementals or sacrifice Vaethyn.