2020-01-24 : In a game using the shared team turns option (a Two-Headed Giant game, for example), Flummoxed Cyclops’s ability triggers if two or more players each attack with only one creature.

2020-01-24 : Once two or more creatures your opponents control have attacked, Flummoxed Cyclops won’t be able to block, even if all but one of those attackers leave the battlefield before its triggered ability resolves.