Does Floodtide serpents ability if "cannot attack unless you return an enchantment you control to it's owners hand" apply to enchantments in your graveyard, seeing as you still control them?
Only asking because apparently wayfaring temples ability "equal to the number of creatures you control" I've been told that includes in your graveyard, because they're still controlled
Basically, you have to return an enchantment from the battlefield.
Cards are only enchantments/creatures while on the battlefield. In any other zone, it would be a card.