In a Supervillain Rumble game, first the next player in turn order chooses a creature, then each other opponent in turn order does the same. Then the other creatures are sacrificed simultaneously.
2017-06-13
wotc
If an opponent controls no creatures, that player isn’t affected by this scheme.
2017-06-13
wotc
All of the other creatures are sacrificed simultaneously after the opposing team chooses which creatures to keep.