It was tested on the test server earlier. It doesn't reduce fury of supports that are immune. Tsukishima's does say "cannot be immuned", but Mayuri's doesn't. This made BWM even less useful.
DeEmEn replied at 2019-1-28 15:35
They told me it was meant to be like Tsukishima's.
Do you have the BR?
I guess it does work. It was tested earlier against a FBI that adds 50 fury, so they didn't see the reduction. They tested again and found it reduced fury from Hasch. False alarm.
EdmondGzv replied at 2019-1-23 12:21
now make Yammy the best VG in the game and please me
yammy would have all immunity. lmao. regen and def increase. basic stats all start at 10k. talent 30% on all stats. skill grand ray cero replenish fury 100% crit 100% block rate 100% atk buf 100% lmao. just kidding though. but that damn takes off all debuffs man thats op af doest need that first mod