Diarmuid, The Half Sword

Indestructible, Trample, Menace, Hexproof
When Diarmuid, The Half Sword enters the battlefield, you may sacrifice 10 non-token creatures. Destroy every permanent you don't control.
When Diarmuid, The Half Sword attacks, you may pay {x}. Put X -1/-1 on creatures you don't control.
When Diarmuid, The Half Sword dies, you may exile Diarmuid. Destroy every permanent.