Calamator

Split Second
As Calamator enters the battlefield, sacrifice all other permenants you control, then gain control of all perments your oppoents control. Untap them.
Calamator's power and toughness are equal to the number of permenets you control that your oppoents own.
If Calamator would be put into your graveyard from anywhere, instead exile the top 10 cards of your library, then shuffle it into your library.