Metalia Endymion

At a glance he resembles Prince Endymion, but everything about him has soured into something dark and warped. His features lock into a permanent scowl, and he wears a corrupted take on the prince's armor, much of it repainted in black and deep red with an altered left shoulder guard. Even the blade he carries differs from the prince's usual weapon.

The transformation begins when Mamoru spots the same warning Beryl had seen: Queen Metalia could never be controlled and would ravage the Earth on her own before Beryl ever got to rule it. Over Beryl's reluctance, Mamoru chose to lock the entity inside his own body and return to Usagi, apparently unharmed. Her power proved too much to hold, and he twisted into Metalia Endymion.

Speaking in Queen Metalia's low, metallic tone, he could manage only the words destroy and planet. He struck down Mio Kuroki once Metalia had no further use for her. His end came when Sailor Moon ran him through with Prince Endymion's sword, guided by Mamoru's spirit. Learning of this, Princess Sailor Moon wiped out the whole planet apart from herself and the prince; Usagi gave her life through the Silver Crystal to restore the world, only for her friends' pleas to revive her. The Shitennou then surrendered their own lives so Prince Endymion could live again, and Metalia Endymion was gone for good.

Metalia Endymion commands the full range of Queen Metalia's power and fights with a long, curved sword. The blade drinks in every attack the Guardians throw at him, even their strongest upgraded techniques such as Jupiter Thunderbolt, and hurls the energy back. His raw strength lets him batter the Senshi so hard that they revert from their transformed states the instant his blows land.