DISCLAIMERS

With this data pack enabled, Ultris will no longer be suitable for survival use as the overriden files for Ultris' functions have been drastically altered and many things that would've worked the way they should in a survival setting may be broken entirely.
This is not a standalone data pack, it needs to be installed on top of Ultris: Boss Expansion in either mod or data pack form, whichever you're using.
For the Shulker Stone boss, you will need to spawn a mob in a team first in a 64-block radius within the location the Shulker Stone will be summoned.

If you want to prevent the possibility of Ultris bosses targeting each other in combat, run the command /trigger ultris_nofriendlyfire

You can then re-enable the possibility by running the command again.

Useful for team battles involving a group of Ultris bosses.

Bosses too weak in battle? Enable Ultra Mode! (Run the command /function 1_splatus:ultris/other/ultramode_enabled)

As a sidenote, the Ultra Wither's code will remain (mostly) untouched as it already works in mob battles on its own.

It is also highly recommended that you put mobs in a team before you have them fight the bosses from Ultris.

Ultris: Boss Expansion — Mob Battle Patch