having same problem.

Hello the artifact quest par 6 of 10, quest 6.8 is bugged i got more than 8 heroes with the needed items..., i did equip the items first then lvled them to lvl 8, still doesnt work... for the love of god fix all of the quests this is frustrating as F to be honest, it forces the player to play around with quests that should alredy pop out as completed if he wished to farm dungeons... i've never seen a company adressing a quest like that! Fix the quest or i'm requesting a refound!  

Thanks man! ♥

just got stuck there right now......this is my setup, i have spent literally millions trying to do this, starting to get really pissed off at the unclear language that is clearly intended to mislead 

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Messed up all my builds, don´t have any more silver and I feel very annoyed! Hope the devs are happy with this one!

I'm stuck on this too, and the solutions everyone is giving only makes it more confusing.

Could someone, say, post a screenshot of a Champion that qualifies?

"The only thing you have to make sure is that you do NOT equip somthing requiring a 4 pice set..... "

OMG, that's what I was messing up. Thank you! Oddly enough I kept using a 4pc and 2pc set and wondered why it never registered, then one time it did register and I couldn't figure out why. It was totally because of the sets.

for all the new players who are wondering how to finish this. Its a Headscratcher at first but after reading all the comments i figured it out. It's damn easy. You need following:

1) 4 Champions any type.

2) Gear them up with artifacts that have 2 set bonus.

3) IMPORTANT - Make sure the champions get 3 SET BUFFS active on them. There you go.

Activating 3 SET Buffs is the Key. Those equipping their champs with a (2) Set Bonus & (4) Set Bonus Artifacts won't be able to trigger the completion.