Invisibility spell as requested by playtesters

Invisibility 30 pts
When this spell is cast, the magic user becomes invisible. The invisible character cannot be targeted by any ranged attack and automatically gains a +2 Defense bonus against any target, unless the target has the See Invisible special ability.
In hand to hand, all attacks against the character are wild actions. The invisible charcter attacks normally and automaticaly gains surprise on his first attack (the first time he attacks one target).

Invisibility ends whenever the character is hit or when he rolls a failure on any Initiative roll. Dispel magic can destroy Invisibility.

A character may render an invisible character visible by raising dust. If dust is raised, or if sand or flour is thrown in the direction of the inviisble character and he fails to defend, he becomes partially visible and can be hit by ranged attacks rolled as wild actions. A partially visible target doesn't enjoy the +2 to Defense anymore. If the partially invisible character moves through water, he can spend one action to clean himself up and gain Invisibility again.