Look for the Death Knights Unit Expansion (RWM21) online or at your local retailer in Q3 of 2017!
https://www.fantasyflightgames.com/en/news/2017/8/14/dread-cavalry/
"The Death Knights Unit Expansion includes another dangerous item in the dark riders’ arsenal with Obcasium's Gauntlet. The Death Knights may exhaust this card in order to give the defender in a melee the rare “Death’s Grasp” condition. When an enemy of Waiqar is caught in Death’s Grasp, they suffer wounds equal to the number of stable energy runes in play before each End Phase. If there are a large number of these runes in play, the Death Knights can destroy even high impact units, including even the Daqan’s foolish hero Lord Hawthorne, with a minimal amount of risk to the forces of the undead."
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* Shield of Margath not included. Terms and conditions may apply.