Wikia

Life Tap
Life Tap Instant cast Restores X mana.
Usable by
Class	Warlock
Properties
Type	Utility
School	Shadow
Cooldown	(GCD 1.5 sec)
Level required	16
Related debuff
Life Tap Absorbs X healing.
TCG image

When the dark arts call for flesh, you can only trust your own.^[1]

Life Tap is a core warlock ability learned at level 16. It converts health into mana. It is somewhat of a signature ability of the warlock.

Modified by

2020

Glyph of Life Tap
Item Level 25Disenchants into:
Not disenchantable
Major Glyph
Classes: Warlock
Requires Level 25
Use: Permanently teaches you this glyph.
Your Life Tap no longer consumes health, but instead absorbs (($MHP * 0.15)) healing received. This effect stacks.
The absorb lasts 30 sec.
Sell Price: 1

Warlocks in a party with a healer can boost their mana if the healer agrees. Note that the self-inflicted damage will rank low on the healers priority list - after the tank and party members taking aggro.
Between fights, use Life Tap to bring your life and mana even. This way, you will regenerate both hp and mana at the same time, and will decrease your downtime.
While Life Tap will allow you to continue casting, it does trigger your GCD, reducing your overall DPS, and should be used sparingly.
Life Tap does not generate aggro.

Patch 3.3.3 (2010-03-23): This spell no longer scales with spirit, and instead scales with spell power.