Bloodmaw

Bloodmaw is a Rift Guardian, a greatly empowered Executioner. He can only be encountered as a random boss in a Nephalem Rift.

In combat, he gains greatly increased damage for his melee blows and increased leaping distance. In addition, he has the following abilities: Due to the mechanics of this boss fight, a great amount of melee damage reduction and crowd control reduction is advised. In addition, fighting Bloodmaw will be much more challenging on the map with limited space, especially narrow corridors.
 * Fast affix.
 * Blood Frenzy: grants +50% increased attack speed, and increases it further the more Life Bloodmaw loses.
 * Cave-In: summons falling rocks, like ones that Zoltun Kulle uses. It his the area for high Physical damage. Only used on players outside melee range.
 * Leap: identical to the normal ability of Executioners, except for it has greatly reduced cooldown and does not have minimum range.

Prior to patch 2.1.2, he also had a fifth ability, Berserk: upon losing every 25% Life, or every 45 seconds, Bloodmaw would enrage, losing the cooldowns and minimum range of his Cave-In ability and the leaping attack for 6-9 seconds. This typically resulted in chain-leap sequence, along with the storm of falling rocks, allowing him to cover a large area and keep the affected players in Stun. Such ability was seen as an unfair advantage to Bloodmaw, and has been removed altogether.