So the 10th level drow cleric is finally cornered and a couple of PC's are beatin' him down. As a last resort, he casts Flame Strike (10' radius, 10d6 damage, reflex for half) essentially right on himself, knowing that the PC's will get hit. The cleric's Spell Resistance is 21. So the spell goes off, SR kicks in, and he doesn't take any damage. Of course it's possible that SR may have been overcome and he would have taken damage. So here's my question: is the drow's own spell subject to spell resistance? That's how I ruled, but would like your opinions.