Every Monster has a random chance to spawn as a Super Boss! The higher the level of boss, the stronger they'll be and the more their drops will be multiplied!

How to /summon a Super Boss

Only works on 1.21.1+

Summoning a ⭐Super⭐ Zombie

/summon minecraft:zombie ~ ~ ~ {NeoForgeData:{superbosses.types:["super_boss"]}}

Summoning a ⭐Super⭐  ⭐⭐⭐⭐Ultra Mega⭐⭐⭐⭐ Zombie

/summon minecraft:zombie ~ ~ ~ {NeoForgeData:{superbosses.types:["super_boss","ultra_mega_boss"]}}