Maazias said:

I can't complete the artifact mission where I'm supposed to upgrade 6 offensive artifacts on a rare atk type champion to level 4 or higher. I've upgraded several on her and the quest just wont progress.

EDIT: On android phone 

Dear Raider!

That mission is start when you are get the mission. You need to start with new artifacts level 0 after eqip to your hero and upp to level 4. The already upgraded and equipped artifacts not counted.

I have completed dungeon challenge 2.1 many times and just now had 3 defense debuff on the boss with the challenge not being registered as complete.  Please fix

Stage 5 sewers mission to get a chest piece with attack as the primary stat. I’ve collected many of these chest pieces and the mission hasn’t completed. 

I need a solution