The Italian Magic forum Metagame.it was notable for announcing its spoiler of Purphoros, God of the Forge during Theros rumor season by posting a picture of the card without any text some hours beforehand. Now, for Commander 2013 and its next officially sanctioned preview, it's doing it again. Occhio del Fato, or Eye of Doom in English, is definitely a rare artifact.. and that's all we know at this time.
The full spoiler is due at midnight on Tuesday, October 15, Italian time (or GMT +1) - in other words, roughly eight hours from now.
The name Eye of Doom is certainly quite epic and scary, and the art definitely looks like a dangerous and hard-to-understand artifact. Perhaps it'll be something like an Oblivion Stone variant; some forum posters have even suggested a connection to Chaos Orb.
In that vein, it could look something like this:
Eye of Doom 7
At the beginning of your upkeep, destroy target permanent chosen at random.
7: Change the target of target triggered ability with a single target. Any player may activate this ability.
Excited to see a rare Commander-exclusive artifact? What do you think it will do? Let me know in the comments.