So, we have - Last Breath (Old) - Karma's a B1#tch (Preboot) - Hardmode (Fanon) - Betrayer (it technically should be the canon Betrayer but it uses the design of Harmony's take) - Wonderful Idea
Nice hardermode sans and hardmode - thats a wonderful idea. To be honest its so unique to have the same type of au that's really related to another AU in a way, I think of it like a connected branch.
List from left to right -Kab/Karmas a B#t¢h -Betrayer -Last breath -Wonderful idea -Hardmode Spoiler -Wonderful idea and hm will die -Wonderful idea blocks last breaths attack and he does not get hit.
KAB sans still sans with karma eye Betrayer sans reference by something Last breath sans still same. Hard-mode yet got half-shadows Hard-mode: wonder full idea where is asgore….