Among Us Imposter

When Imposter enters the battlefield or is turned
face up, turn all creatures in play face down.
Then, all face down creatures gain
"Morph {3}".
Whenever a creature dies, if Imposter is face
down, reveal Imposter to all players, then each
player secretly choses a face-down permanent.
Turn that card face up. If it's a creature, destroy
that card. If Imposter is destroyed this way, exile
target creature you don't control.