Magnar, Betrayer of Rakkis is a unique Revenant Soldier in Act V of Diablo III. He appears as the "boss" of the Treason's Final Reward event in the Paths of the Drowned.
In combat, he has Plagued and Mortar traits, as well as ability to perform a delayed short-ranged blast of Poison damage. He is assisted by hordes of Skeletons and Skeletal Archers, but cannot spawn more.