1st level Ritualist, 4 minor rituals (18 Int, or 16 and Extra Charge feat):
Ritual of Blood (+1 damage to every damage source)
Bitter Winter (1d4 nonlethal cold/round)
Shards (1d3 piercing/round, save for half)
Vampiric Circle (1 damage/round, gain 1 Temp HP)
Discharge them all at once to deal an actually decent amount of damage in a 10 foot radius (6.83/round on average for 2 rounds, assuming opponents make the save on Circle of Shards, or 8.5 if they fail). Sounds like a decent low-level combo if you have nothing better to do.
On the other hand, you have to be within 10 feet. On the other other hand, you still have all your actions to add on to that.