If I have Prophet of Kruphix out (which gives all my creatures flash), can I use the bestow ability of my enchantment creatures during my opponents turn? For example, can I bestow Thassa's Emissary on one of my creatures, during my opponents turn?
Bestow text for reference:
If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.
Similarly, if I do not have enough devotion for Thassa, God of the Sea to be a creature, can I use flash to cast her during my opponents turn?
Thassa's devotion related text, for reference:
As long as your devotion to blue is less than five, Thassa isn't a creature. (Each Blue in the mana costs of permanents you control counts toward your devotion to blue.)