From WoWWiki
| Inferno |
|---|
|
| Usable by |
|---|
| Class | Warlock |
| Properties |
|---|
| Type | Utility |
| School | Shadow |
| Cooldown | 20 minutes |
| Talents |
|---|
| Talented | No |
| Other information |
|---|
| Ranks | 1 |
| Related debuff |
|---|
|
- The master of every infernal worries not about its death, but that it might survive too long.TCGHoA 127
Inferno is an warlock AoE spell that summons an infernal. As of patch 3.0.3. this spell can be cast both indoors and outdoors (previously only outdoors) and requires an [Infernal Stone]. Once in the infernal is summoned, it will automatically be under the effects of Enslave Demon for one minute, after which it will die; prior to patch 3.0.3, it would remain enslaved for approximately five minutes, after which it would break free and require another enslavement to be kept under control. Inferno has a cooldown period of twenty minutes. An Inferno has a permanent Immolation aura that breaks CC. In Alterac Valley players tend to over estimate an Infernal's strength and can be used as a rather effective distraction target.
Inferno has a 100% spell power coefficient.
This spell can be learned from [Grimoire of Inferno] or the quest 
[55] Kroshius' Infernal Core. However it is much easier for high level warlocks to get this spell through the book rather than the quests. The book has a roughly 3% drop rate from Scarshield Warlocks in Lower Blackrock Spire, and should drop after 1 or 2 runs.
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