From Portals of Phereon Wiki

Spell unique to Krava.

It is absurdly powerful, possibly the most powerful skill in the entire game. The bonus damage appears to be exponential, not linear. So it's not adding 25% of the base Magic per tile, it's adding 25% of the total damage per tile. Additionally it can be used every turn for just 1 AP.

Best combined with WindShaper.