Dark Sound
Spellcraft DC: 0
Components: V, S, XP
Casting Time: 1 action
Range: 300 ft.
Area: Twenty 10-ft. cubes
Duration: Instantaneous
Saving Throw: Reflex half
Spell Resistance: Yes
To Develop: 0 gp; 0 days; 0 XP. Seed: energy (DC 19), Factors: change area to four 10-ft cubes (+2 DC), increase area by 400% to twenty 10-ft cubes (+16 DC), 1-action casting time (+20 DC), +15 dice of damage (+30 DC), +7 on caster level to overcome SR (+14 DC), increase spell's save DC by +10 (+20 DC), increase damage die to d20 (+40 DC). Mitigating factors: burn 10,000 XP (-100 DC), 42d6 Backlash (-42 DC), orb of storms material component (ad hoc –19 DC).
The terrific wave of sonic energy which issues from you deals 25d20 points of sonic damage to all creatures within the affected area: they may make a reflex saving throw (DC 30+ relevant modifier) for half damage. You enjoy a +7 bonus on your check to overcome the spell resistance of those in the area of the spell, if applicable.
*
I actually intended to add this to the above post, but forgot.
Nwm's decision to become an ascetic came after the events here - partly in response to the fact that he'd blown up two magic items casting spells (he really has no respect for them at all). The story hour hasn't caught up with the rogue's gallery thread at this point.
And only the staff was destroyed when he cast She is tired of your interference.
This was a massive burn in XP, though - Nwm was eligible for 22nd level, and this dragged him way back down. It was an impressive exercise, but kind of futile - they retreated one round later.