Only one member(s) allowed per turn, per universe.

Exclusive as it gets ♥♥♥♥♥♥♥♥. Beetlejuice truther, emega optimus elite before it was even cool to drool. Frequent friend mounting encouraged if possible; known to be rare occurence with one member rule. Solved via befriending one's past self, and completing mounting process via convenient tear in time.