Intertwined by Fate

Choose an opponent. You and that player may only attack, block, and cast spells targeting one another and permanents you control.
All other players can't participate in the game as long as this card is on the battlefield. When this card leaves the battlefield, the game resumes as normal.
"It is just you and me, dear sister, no one else will disturb our final battle!" -Harvuk, To Havina