Felguard ( Primary ability of Demonology warlock, available at level 10).Additional Voidwalker spells include Sacrifice, which reduces your Voidwalker's health but creates a 30-second damage absorption shield for the warlock, and, which is an out-of-combat self-heal for the Voidwalker. At higher levels, however, it is unable to hold a mob's attention for very long. The Voidwalker's main ability,, is a taunt that causes enemies to attack the Voidwalker. He is an excellent tank, and is able to keep aggro.
This demon deals little damage, but has very good armor and hit points.
At max level, the Imp is generally favoured by Destruction warlocks. The Imp is a damaging minion in the warlock's arsenal, at least until he runs out of Mana. The Imp is very fragile and will die quickly if attacked. The Imp's main role is a support minion, designed to do additional damage alongside the caster via its attack. Warlocks can summon a variety of minions, each exhibiting different skill sets which are useful in different situations: Only Demonology warlocks are able to summon the Felguard, through the ability. Deathstalkers, Vilefiends, Demonic Tyrants, Infernals and Darkglares function as guardians, and may be used along with other demonic pets. Warlocks must choose which one of the available permanent minions to have active at any time.