Datamining for Phase 3 has revealed a whole host of new items, among them are four new Darkmoon Decks. These all reward epic level 50 Trinkets. While not confirmed, the cards to create these decks likely drop from overhauled level 50 content, or Nightmare Incursions.
The Wilds Deck rewards Darkmoon Card: Overgrowth. This Trinket has the text “Equip: Chance on successful heal to restore 8 Energy, 1% Mana, or 4 Rage.” at a 5% chance. This sounds very similar to the wording of the Revitalize talent in Wrath of the Lich King, which allows Druids to become a resource battery, instead of only a Healer.
The Nightmares Deck rewards Darkmoon Card: Torment. This Trinket has the text “Equip: Gives the wearer a chance on attack and spell cast to Torment their target, causing them to wander in suffering for 3 sec.” While the word “Torment” has generally been used for the Voidwalker Taunt ability, this seems to function more as a Scatter Shot type effect.
The Dunes Deck rewards Darkmoon Card: Sandstorm. This Trinket has the text “Equip: Chance on spells and attacks to summon a sandstorm that circles you, dealing Nature damage to targets it passes through.” No direct comparisons come to mind for this, but it could be a lot of fun.
The Plagues Deck rewards Darkmoon Card: Decay. This Trinket has the text “Equip: Spells and attacks sometimes leech health from the target, and apply a stack of Decay. When decay reaches 5 stacks, the target takes damage.” Again very few comparisons to make for this one, but it does sound interesting. If it isn’t a fixed proc per minute rate, I can imagine Rogues having a great time with this in PvP.
