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Malefactor Vephar, Tempest of the Damned is a unique Terror Demon found within the Besieged Tower Level 1 in Act IV of Diablo III. He was added in Patch 2.2.0.

In combat, he has the same core abilities as Nekarat the Keywarden: radial flame attack that blasts everything within roughly 20 yards for high Fire damage, and forward rush with great speed that deals damage and knockback to players in his path. Like Nekarat, he cannot hide in shadows like other Terror Demons. In addition, he has Orbiter, Vortex, Thunderstorm and Illusionist traits.

A bounty may be offered to kill Malefactor Vephar, in which case the secondary objective is to kill 50 enemies.