Conjure Drainheart

Summons a spectral longsword of iridescent blue that does 1d8 + casting ability modifier, chance to hit is also casting mod, on a successful hit higher than 5 dmg it stuns an enemy for one turn. Every hit after the first lowers the dmg requirement to initiate a stun against a foe. example: one a 5 dmg hit target stunned, if second hit is four dmg or more target is stunned for another turn, and so on. Spell ends upon end of combat.