Superior Mana Oil

Superior Mana Oil is a potion that is applied to a weapon. When applied, the weapon will restore 14 mana to the caster every 5 seconds. This effect persists through death, as it is a weapon buff, and not a personal buff.

Source
This item is made by Enchanters with a skill level of 310.

The components are:

is sold by in Shattrath City.