All affected players should first make the choices, and only then the effects happen all choices first, then all effects simultaneously. And you wouldn't be too wrong for thinking that
Against White Eldrazi this plan doesn't work as well due to their Containment Priests, but there's a chance that the Oath plan will succeed anyway by being unexpected
They remained sealed and were carefully stored away
Special Summon 2 Level 3 or lower Beast monsters from your Deck, but their effects are negated, also they are destroyed during the End Phase
Pokemon Jessie, James and Wobbuffet Behind the Bushes Jessie, James & Wobbuffet peak out from behind a tree and some bushes
II, III - Whenever you cast a noncreature spell this turn, create a token that's a copy of a non-Saga token you control