Q: Aura: I see, this transformation is similar the the Saiyans turning into Oozaru when they see the full moon. So this mutation, is it in his DNA, or is it somewhere on the surface of his body? The reason is because a Saiyan's tail is the source of their great ape tranformation, cut it off and they can't transform. So if Rare mind has a source of the transformation then it should be cut off.

A: Rarity: But it's his horn.

Rarity begins to tear up.