Asura's Wrath

You touch a single willing creature, granting them the divine favor and wrath of the deity Asura. Six ethereal arms form behind the target, and can be controlled by them with no more then a thought. 

The target may command the arms to perform an action while they perform a completely separate one themselves. For example, the target may open a chest while the arms hold some kind of cover over them to protect them from ranged assaults, or they may try to pick a lock while the arms attack adjacent targets (they deal 1d4 unarmed damage).

The target may call upon Asura when making an unarmed strike, fully invoking the spell and causing the arms to solidify. For a single turn, whenever they would make an unarmed strike they may make an additional unarmed strike without using an action. For example, if a monk would make 3 unarmed strikes that turn they would instead make six. However, the target may not perform any other action on their turn, before or after invoking the spell, and may not take any reactions until their next turn. They also gain 1 level of exhaustion, and the spell dismisses itself after the last attack roll is made that turn.