Elder Dragon Enters the Pit

You may only cast Elder Dragon Enters the Pit if
you control 4 or more emblems.
PvE {t}: Create a 20/20 white Elder Dragon
token under the PvE player's control. If a player destroys a white Elder Dragon they get a 20/20
black Zombie Elder Dragon creature
token with "If a enemy creature would be
dealt combat damage, exile it instead." creatures
you control have flying and +5/+5"
If Elder Dragon Enters the Pit enters the battlefield without being cast, sacrifice it