I was thinking chaff so you couldn't see the exploders that spawn in the room. With arc burn, if you didn't see one spawn, they could wipe you. EDIT: Of course wiping you really doesn't matter. Took all the excitement out of nightfalls now that we don't go to orbit.

I know what chaff does.. but year one players who have done a couple omnigul nightfalls before would know where and when spawn is coming.. I do at least.. it would probably screw up some taken tots the first couple times.. but I doubt losing radar would effect a year one person all that much... doesn't for me anyway..