Nightmare Pact

Create a 9/9 black nightmare demon creature
token with flying, haste, indestructible, and
trample.
You get an emblem with "At the beginning of
your upkeep, flip a coin. If you lose the flip, sacrifice all nonland permanents you control and discard your hand."
"It is absurd to divide people into good or bad. People
are either charming or tedious."
-Oscar Wilde