This promo pack was given away at GenCon 2011 and contains cards intended for Thornwood Siege and Dragonspire.
The following three cards are available as the Thunderstone: Vicious Promo Pack.
1x Void Apocalypse (Hydra, Dragon)
1x Thornwood Forest (Setting)
1x Guardian of Revenge (Guardian)
1x Werewolf Randomizer
1x Istvan Torok (Werewolf)
2x Direhowl (Werewolf)
2x Ragetalon (Werewolf)
2x Wolf Pack (Werewolf)
3x Grimbite (Werewolf)