Summon Vilefiend

In the Demonology Warlock talent tree, Summon Vilefiend sits in the Demonology specialization talents, row 9 of 11. It is a single-point node. Its row opens once 20 points are spent in Demonology Talents.

Connected above

The tree draws a line into Summon Vilefiend from Demonic Calling.

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  Demonic Calling2 ranks

  Call Dreadstalkers costs 1 less Soul Shards and its cast time is reduced by 50%.

Connected below

Summon Vilefiend leads on to Mark of Shatug or Mark of F'harg.

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  Mark of Shatug

  Your Summon Vilefiend becomes Summon Gloomhound and learns the following ability: Tooth and claw are drenched in malignant shadow magic, causing the Gloomhound's melee attacks to deal an additional (31.8% of Spell Power) Shadow damage.

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  Mark of F'harg

  Your Summon Vilefiend becomes Summon Charhound and learns the following ability: Cloaked in the ever-burning flames of the abyss, dealing (16% of Spell Power) Fire damage to enemies every 1 sec.

Same row

Also on this row: Doom, Hellbent Commander and Grimoire: Imp Lord or Grimoire: Fel Ravager.

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  Doom

  When Demonbolt consumes a Demonic Core it inflicts impending doom upon the target, dealing (403.1% of Spell Power) Shadow damage to enemies of its target after 20 sec or when removed. Damage is reduced beyond 8 targets. Hand of Gul'dan reduces the duration of Doom by 3 sec.

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  Hellbent Commander

  Your demons deal 1.1% increased damage for each demon you control.

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  Grimoire: Imp Lord

  Summons an Imp Lord to assist you in combat for 20 sec and will remove 1 harmful effect from you when summoned. Transforms into Singe Magic while on cooldown.

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  Grimoire: Fel Ravager

  Summons a Fel Ravager to assist you in combat for 20 sec and will purge 1 beneficial magic effect from an enemy. Turns into Devour Magic while on cooldown.