Minor Mana Potion

Minor Mana Potion is a potion that restores 140 to 180 mana.

Source
This potion is made by Alchemist with a skill level of 25.

The recipe is learned from the trainer.

It also drops from level 10 - 25 mobs and can be fished from level 10 - 25 zones.

It is sold by Dawn Brightstar in Elwynn Forest and Lizzarik in The Barrens.

3 are also rewarded for completing the quest, which is given by Captain Grayson in Westfall.

Minor Mana Potion as a Quest Objective

 * 4 are required for the quest Ineptitude + Chemicals = Fun, which is given by Lomac Gearstrip in the Stonetalon Mountains.