Your shadowy illusions are more potent.
Prerequisite(s): Spell Focus (illusion).
BENEFIT
When casting greater shadow summoning, greater shadow elemental, shadow summoning, or shadow elemental (and, at the GM’s discretion, any similar spell with the shadow descriptor that mimics a spell of another school), that spell is 20% more real than normal.
MP Increase: +1 (a solid shadows spell costs 1 additional MP more than the actual MP cost of the spell.)