LK9T9akaSEKTOR
Auto-translated
These are probably the Dark Champions of Necropolis. The mod is good, but the unupgraded Knight starts flying on a horse.
There was also a mod that moved the undead to Tier 7. I played with it for a very long time; it's a bit buggy (the red griffin instantly exits the dive attack), but it's good.
We're probably talking about the same mod.
It seems we're talking about the same mod.