Official Move Approval IV

[Mark]

Decay - 300 - Debuff, Ranged Proficiency, Area Effect Proficiency:

Igniting his horn, King Sombra will form a gas cloud. This takes about 10 seconds for him to do so. But there's something unique about this cloud because it doesn't damage an opponent. What it instead does is that it attacks their weaponry similar to how acid would eat away metal, this cloud rusts their weapon they have on hand, and makes it harder for them to use. This requires him to stand perfectly still, and while using or charging this move he cannot defend, or attack. In short, when he is preparing or utilizing this move he is entirely helpless and incapable of moving his body, or using his moves at all. Furthermore this is very draining on his stamina, which is why he can only do it once every 2 minutes.

So to confirm, this makes them slightly less skilled with their weapon temporarily? If they escape the cloud, does the debuff wear off? Also in your edit you removed the range and the duration of the debuff, both of which you'll still need to include.