I am sure it would apply to other spells, but this question specifically came up yesterday during revealing of Mind Control Enchantment.
The card says that Mind Control can only be revealed between Action Phases.
Situation:
Forcemaster vs Warlord. Warlord has initiative. Warlord has 1 creature on the board.
First quicast: Warlord passes. Forcemaster casts mind control face down on Warlord's creature.
Acion Phase: It is Warlord's first Action Phase. But before that, Forcemaster reveals Mind Control on the creature taking control.
Is that a legal play?
Thanks.