I'm just giving me suggestion on today's fight with void, dont enter this quest today if u have no champs that can counter void cause the debuffs he put on you (my case is Epic diff), would cause your champs to suffer damage and your attack keeps missing him (cause of the annoying node that says if you attempt the same BASIC attack twice Void has 100% chance to evade).
So I used r3 5* Aegon (sig lvl 40+) (100 combos)(still lose cause of that "same basic attack" node

) and 4* max NF (keeps spamming heavy and bleed)(ended using one 40% revive) and finally got through and got 790 5* shards