Rite of the Nemesis Needs to be Changed
"Reach maximum Mutation Rate 4 times".
This requires you to play AT LEAST 4 games as Nemesis which is not a "daily" challenge. All other killer challenges can be done in one game, usually easily.
Why not change it to, "hit 4 survivors with tentacle strike"? Much more reasonable.
Comments
It will change with the next patch to be "reach maximun mutation rate 1 time". Source: patch notes.