Awakened Ally

Once per full moon, the possessor of any item containing a soul (whether a willing soul, trapped conscious, or otherwise stated) can summon forth the soul as a semi-corporeal ally. The ally will function as a combat active character, taking a turn after the summoner in the initiative order. They  will get one turn with up to two actions (excluding movement) to aid the summoner and turn the tide of battle. 

*any class can use this if in possession of a soul item (Yes, even you Barbarians!)