The biggest mystery of Theros at this point is its gods. Since we already have something of an idea how the heroes and monsters work, the gods are the last faction that have yet to be spoiled. Also, they're assuredly the most unique, being enchantment creatures, and a relatively unique concept among the worlds of Magic; gods and religion typically aren't part of Magic settings in a huge way, but are rather used as sort of background information, if at all. Now, however, it seems there are MTGSalvation and 4chan sources for the text of the blue god, Thassa, who rules over the sea. Here she is in purported card for,.
Thassa, God of the Sea 2U
Legendary Enchantment Creature - (God? Avatar?) (Mythic)
As long as your devotion to blue is less than five, Thassa isn’t a creature (and loses indestructible?). (Each U in the mana costs of permanents you control adds to your devotion to blue.)
At the beginning of your upkeep, scry 1.
1U: Target creature you control can’t be blocked this turn.
At first, this card's abilities seem somewhat disjointed; indestructible, scry as yet another, returning, keyword mechanic in Theros, and that unblockability-granting activated ability really don't add up to a cohesive whole. Still, the thing that seems to be in favor of this card being real is devotion - this seems to have been posted before devotion was spoiled officially today. As much as this doesn't seem to necessarily be a real card to me, it's seeming more and more plausible.
And as a card, she's a hell of a toolbox; even when not in creature form, scrying every turn allows you to stack your deck - and get out your big but non-evasive creatures into your hand, then drop them and make them unblockable. When creature mode comes on, she's an amazing beater that's almost impossible to deal with, as she can turn herself unblockable and is invulnerable to damage and destruction, or, in other words, a large majority of removal spells - an incentive to play monocolor or at least hybrid in a post-Ravnica environment.
Regardless, scry seems to be an odd mechanic to bring back, or at least a somewhat "random" one; there are plenty of abilities, such as convoke, that would have been much more appropriate, which is a strike against its being real.
What do you think of Thassa and the possibility of the other gods being like this? Let me know in the comments.