Corpse
Chromatic Orb-
+3 to hit at 1", +2 to hit at 1" to 2" and +1 to hit at max range of 3"
at 3rd level it does 1d8 fire, and save vs combustion or take another 2 from fire damage objects within 1' are set aflame.
It also has the nice advantage of being able to damage creatures that can only be hit by weapons up to an enchantment of +5....nice.