Alle, Thief of Identity

+1: Until end of turn, Alle becomes a copy of any creature exiled on it except with "Whenever this creature dies, return Alle to its owner's hand."
-3: Exile target creature an opponent controls onto Alle until Alle, Thief of Identity leaves the battlefield.
-10: Search target opponent's library for up to 10 creature cards and exile them onto Alle. Then, shuffle that library.