The official TCG website has posted information about another new card to the 'Platinum' set. Click on the card to get a higher resolution.

Appearing in its Origin Forme, Giratina LV.X (Platinum, 124/127) can be played on either the Altered Forme or the Origin Forme of Giratina. Giratina LV.X’s Invisible Tentacles Poké-Body is deliciously disruptive, forcing your opponent to discard 1 card whenever he or she tries to attack. If your opponent can’t discard 1 card, then the Pokémon cannot attack at all! Giratina LV.X can make quick work of your opponent’s Bench, using Darkness Lost to inflict 30 damage on each of your opponent’s Pokémon. If a Pokémon is Knocked Out by this attack, then the Pokémon and all cards attached to it go to the Lost Zone instead of the discard pile. What is the Lost Zone? Cards in the Lost Zone are put face-up and out of play. Unlike cards that are simply discarded, these cards are unplayable during the rest of the match. Make room in your deck for Giratina LV.X!

I have to say, this is one of the coolest looking cards in a long time.