[Snake]

Maybe it could inflict lower HP cost, but you self-inflict Cursed Wounds. That way it could get some more buck to its shot, like increasing your damage percent, and damage reduction equal to the amount of HP damage % you took this round. So something like...

2% = 2% damage/DR.
4% = 6% damage/DR.
8% = 14% damage/DR.
16% = 30% damage/DR.
etc.