Color Spray

Close-quarters spell
Cyclic (cast once per battle OR at-will when the escalation die is even)
1d4 nearby enemies in a group
Intelligence + Level vs. MD
2d8 psychic damage, and if the target has 10 hp or fewer after the damage, it is weakened until the end of your next turn.
3rd Level Spell: 
4d6 damage, 20 hp or fewer.
5th Level Spell: 
6d8 damage, 30 hp or fewer.
7th Level Spell: 
10d6 damage, 40 hp or fewer.
9th Level Spell: 
10d12 damage, 60 hp or fewer.
Adventurer Feat: 

Increase the hit point threshold of the weakened effect by 5 hp.

Champion Feat: 

On a miss, the spell deals damage equal to your level.

Epic Feat: 

The spell now targets 1d4 + 1 nearby enemies in a group.