Mallet Lords first appear in the Hell Rifts of the fourth act of Diablo III. They are able to move quickly through monster groups by stepping over them. While they lack agility and speed, they are tough, immune to Knockback, and can deliver slow, brutally punishing attacks that can easily fell unprepared adventurers. It is better to deal with them through kiting techniques if possible, or use ranged attacks. It is possible to stun or disorient them. They are especially deadly when combined with Vortex, Teleporter, Jailer, Frozen, Waller or Wormhole affixes.