Three Dooms

Ranged spell
Recharge 16+ after battle
Target: 
One nearby enemy; chain spell
Attack: 
Charisma + Level vs. PD
Hit: 
2d4 x 10 random energy damage, and you take damage of the same type equal to the unmodified dice roll (2d4, 2d8, or 2d12). (Note that there's no Charisma bonus to damage.)
Miss: 
Half damage, and you still take random energy damage equal to the unmodified dice roll.
7th Level Spell: 
2d8 x 10 damage.
9th Level Spell: 
2d12 x 10 damage.
Chain Spell: 

Each time you make a natural even attack roll, you can attack a different target with the spell.