Attack: Skull: 1500, Melee: 1000, Solarmoon's Beam: Instant kill, with the death message: "[player] succumbed to the Power of Solarmoon!"
Speed: Can't move or be moved, Skulls shoot like normal wither, but can home in on you. In her normal form, same speed as player
Defense rating: Omega
Special ability: One-shots wither avatars, making your own pets hate you, deletes wither abilities, summons shades of the three sisters, doesn't lag much, being glorious, godlike.
Represents: The sun, moon, and Reality, The Queen of Rage
Summon: Right-click the Day, Night, and Wither Cardinal in close proximity with Solarmoon's Key (Drops from Wither Avatar)
One of the four wither sisters, the Celestial Wither is probably the hardest boss to take down, not only that, but she can turn your friends against you, be it Samantha, Friendly withers, wolves, etc. She will make your life miserable because she's so hard to take down. BUT there's one alternative to win the fight; to use Samantha's Music Box. Then her defense rating will drop to: Non-existant. If her HP reaches 0, she won't die. Her true form will drop to the ground, unconscious. She must be put into a bed, and in a few Minecraft days, she'll wake up and join you, gain all of the three girls' abilities, and be able to move! After this happens, the entity name will be the Celestial Wither Girl. If you spawn another Celestial wither while Solarmoon is on your team, a random wither girl, or extremely rarely a wither avatar, will appear instead. If the Avatar does spawn, however, the game won't lag nearly as much because his abilities will be subtracted to nothing. If fighting the boss, you can call her by her alias: THE QUEEN OF RAGE!!!!!
Hmm, perhaps this could be a base for the Wither girl sister's currently unknown mother...I'll think on it, but don't guarantee the op-ness of it will get through.
Oh, and no other withers are to go above the Wither Avatar in power (other than Witherzilla)