What happens if I use a 6r1 champ for nameless gm's last phase?

EmperorCosmos

I don't have any rc immunes ranked up, cuz none of them are good enough generally or exist as 7*s.. is it possible to do nameless gm's last phase with a 6r1 or would I have to rank 2/3 my 6* wiccan? I'm not sacrificing heimdall or proxima to put in hulk and overseer.

Greekhit

Nothing happens.
You can do last phase even with a 4*.
Just do not block anything.
You won't need to deal any damage anyway, just to complete the four tasks (sp1, sp2, sp3, intercept) in no specific order and they persist between fights even if you get ko.
If GM builds to sp2 do not block it, let it struck you it won't kill you even if you are at 1%.
It deals a percentage damage of your current not max health.
As far as you won't block anything, you are good to go with any reverse immune champ no matter the rarity or rank.