Arthrallur, Slayer of Planes

Trample
Hexproof
Indestructible
Menace
Arthrallur, Slayer of Planes cannot be countered.
If Arthrallur, Slayer of Planes were to be removed
from your hand or from the battlefield, shuffle
him into your library.
"I am more than Nicol Bolas."
-Arthrallur to Nissa