It took dozens of Killavolt for my first Brainstormer, M2. Then I got a second one after few Kategawa runs. I got lots of goodies during Killavolt so no big deal. But still, RNG kills me sometimes.
i think there is actually something wrong with the event.
Was thinking the same. The results certainly dont feel like advertised.
I did 80 KV runs. No Brainstormer. 20 runs alone this morning without a single legendary.
you have to wait a minute or so in the menu screen to get the microupdate for this to actually work.
i havent testen the bossdrops because im still on first play through and not yet lvl50, but its something they specificaly mentioned in that thread iirc.