Think one of the helmets already does that on void kills. But doesn’t even have to be dealing the damage. Could also set it up as a high risk high reward where taking energy damage can recharge (similar to risk runner). Or depending on balancing needs even having energy damage attacks passing near the lock. Was thinking if locks are supposed to be masters of energy and light, then why couldn’t they repurpose what is already around them instead of only generating it themselves. So basically a conservation of energy style perk. If similar is used on all classes would make it the most effective way of killing one class might put you at a disadvantage versus a different class. So using something like this suppressor grenades would be more effective vs locks but less effective vs hunters if they are given mostly weapon based passives.