Bill, Dream Demon

Indestructible, Hexproof
As long as you own Bill, Bill can't leave the battlefield.
Bill is an enchantment if you don't own it.
{5}: Roll a die, then do the following based on the result. Any player may activate this ability.
-1 or 2: Destroy two target permanents.
-3 or 4: Two target permanents lose their abilities until your next turn.
-5: Target opponent gains control of Bill.
-6: All of the above.
Owning the card isn't the same as controlling. You own the card if it started in your deck.