New Darkmoon Faire cards stats !

[Boubouille]

Vengeance (Storms)
You have a 10% chance when hit by an attack or harmful spell to deal 95 to 115 holy damage to your attacker.
Wrath (Furies)
Each time one of your direct damage attacks does not critically strike, you gain 17 critical strike rating and 17 spell critical strike rating for the next 10 sec. This effect is consumed when you deal a critical strike. (Stacks up to 20 times)
Crusade (Blessings)
Each time you deal melee damage to an opponent, you gain 6 attack power for the next 10 sec., stacking up to 20 times. Each time you land a harmful spell on an opponent, you gain 8 spell damage for the next 10 sec., stacking up to 10 times.
Madness (Lunacy)
Each time you land a killing blow on an enemy, you gain the Power of Madness.
(No infos about it yet, and no, it's not the Portal of Madness effect, it's a spell used by the monsters of the Edge of Madness at Zul'gurub to summon friends.
Source

[somnif]

The Portal of Madness effect is the thing that pops up when you kill the imps in ZG im afraid (summons "Mad Voidwalkers" if I remember right). Still no word on what the madness effect is in this case. Sure someone will figure it out soon enough though.