Nevinyrral's Colossus

Trample, Indestructible, Toxic 5

Nevinyrral's Colossus enters the battlefield tapped.
If Nevinyrral's Colossus would be put into a graveyard from anywhere, reveal Nevinyrral's Colossus and shuffle it into its owner's library instead.

If Nevinyrral's Colossus does combat damage to a player Destroy all artifacts, creatures, and enchantments that player controls.
"It walks in silence, leaving nothing but echoes and ash—a harbinger of the end, written in steel and ruin."