Benefit

A fiery nimbus surrounds you whenever you cast a spell with the fire or light descriptor. This makes it almost impossible to hide while spellcasting, but it makes you difficult to look at as well. For 1 round after casting a fire or light spell creatures that attempt to attack you take a -2 penalty on attack rolls. Creatures must be able to see you to be affected by Flash Casting, and creatures with Hindsight or creatures that cannot see are immune.