Hardlight Afterburner

Hardlight Afterburner is a new Rare item in Risk of Rain 2. It adds 2 charges to your Utility skill per stack, and reduces its cooldown by 33%. It greatly increases mobility and is visually shown as two purple afterburners protruding form the characters shoulders.

However, some caveats apply; Mercenary's Blinding Assault can be chained 9 times, but will still immediately go into cooldown if you miss an enemy.

As the Engineer, you can keep 100% shield item with only one stack, but be warned throwing another Bubble Shield will remove the previous one immediately.