Boss
In vanilla, there are three bosses: the Ender Dragon, the Wither and the Elder Guadrian. For Difficulty Death Scaler, the Warden is also a boss.
Every boss can be buffed with a netherite ingot (right click on them). The buff depends of the boss.
When you kill a buffed boss, the global difficulty is decreased, like no one dies during 12 hours.
Buff
The Ender Dragon's stats are not modified by the buff, but its life is increased if there are many players in the end with a high global difficulty. Its explosion resistance is also increased with a high global difficulty.
The Wither's stats are not modified, but you can't trap it in bedrock: you have to do the real fight.
The Elder Guardian:
- has a better knockback resistance
- is smaller
- has more health
- is faster
- do more damage
The Warden:
- is faster
- is angry when it is buffed