A gamemode for only the most hardcore of players. This gamemode would include Normal UHC rules such as no natural regeneration and the default hard/hardcore gamemode. Other things that would be added :
Combat Tag
8 hearts instead of 10
CRAFTABLE God apples
5k World Border (10k after first dragon dies)
And many other features making the server faster paced and suited for the PvPer, Greifer and raider types of players.
This is all just a suggestion for a fun little gamemode that can be ran with minimal stress on the main server. (Would be ran on another instance)