"Figurehead"
Where your creatures leave the fight, and you fight head in their stead, but wouldn't remove any effects that were enacted by creatures on the player before hand, and it would only last max. 10 rounds, more like 5, though. Unreasonable, I know. but, after you left the fray, and damage done to you would be divided amongst the creatures who fought in the beginning, regardless of strength, it would be percentage wise, even if it kills a creature. All effects, like Protect and Defend, would act as if nothing would happen. I don't quite remember, how the spell system works from what Mur said, but if since spells make a temporary negative effect, it would require at least 1/4 of what that characteristic is. Also, it would need Imagination, Transposition, and one or two more, Also, It would need Imagination at least 75 (?) and Transposition maybe 60(?). I don't think of any others off-hand that would be needed, as I don't recall the descriptions, but at least one other I'd think would be needed, with at least 50(?) skill needed. Maybe double or triple these values, even quintuple them, if necessary, but I think the original proportions might be semi-balanced.