In The War Within, Engineers will be able to craft Potion Bombs, powerful external potion buffs that augment small groups of players within range. These Potion Bombs currently come in three different types: DPS, Movement Speed, and Healing.
Using a Potion Bomb is simple — use it as you would any other consumable, choose your target area, and buff your allies while damaging enemies caught in the radius. While Engineers are the only ones able to produce these new support consumables, anyone — even non-Engineers — can use them to help their group.
Blizzard described these new consumables in their recent Alpha Notes for The War Within:
While these Potion Bombs represent an interesting and experimental new take on consumables, they also represent yet another foray into external cooldowns in group play. Spells like Power Infusion have long been the subject of frustration among the player base, and the Augmentation Evoker Class was designed in a way that brings external cooldowns and buffs to the forefront. The sheer power involved with these externals for players makes them required in many instances of high-end play, while a very vocal segment of the player base advocates for their removal altogether.
High-end play in World of Warcraft requires an incredible amount of coordination between large groups