Infernal Rapidity
When your Wild Imps cast Fel Firebolt, they have 10% chance to instantly cast another Fel Firebolt at 200% effectiveness.
Tree position
In the Demonology Warlock talent tree, Infernal Rapidity sits in the Demonology specialization talents, row 5 of 11. It is a single-point node. Its row opens once 8 points are spent in Demonology Talents.
Connected above
The tree draws a line into Infernal Rapidity from Imp-erator.
Imp-eratorIncreases the critical strike chance of your Wild Imp's Fel Firebolt by 15%.
Connected below
Infernal Rapidity leads on to Imp Gang Boss and Demonic Brutality.
Imp Gang BossHand of Gul'dan now empowers 1 of the Wild Imps it summons, increasing its damage dealt by 100%.
Demonic BrutalityDamaging critical strikes dealt by you and your demons deal 230% damage instead of the usual 200%.
Same row
Also on this row: Rune of Shadows, Carnivorous Stalkers and Fel Armaments.

Carnivorous Stalkers2 ranksYour Dreadstalkers' attacks have a 10% chance to trigger an additional Dreadbite.
Fel ArmamentsThe cooldown of your Felguard's Felstorm is reduced by 10 sec and damage dealt to your primary demon is reduced by 10%.
Talent trees
Infernal Rapidity is in the talent tree of 3 specializations. Warlock: Affliction (DPS), Demonology (DPS), Destruction (DPS).
Infernal Rapidity Changes by patch
Tracked changes to this talent between game data builds, newest first.
- First tracked in the game data (patch 12.1.0)