How to Use:

All settings can be adjusted using:
/function final_adversaries:adjust_bosses/...
If no boss is active, the datapack has no impact on performance.

The mod automatically summons bosses at their uninitialized spawnpoint marker.
A marker is initialized when a player enters a 50-block range, triggering the boss spawn.

To make bosses spawn in your custom generated structures:

Disable auto-spawning to prevent markers from initializing automatically:
/function final_adversaries/adjust_bosses/auto_spawn_bosses_toggle
Place the required markers inside your structure using:
final_adversaries:adjust_bosses/...
Save the structure with entities enabled for the markers to be saved in the structure file.

General

When defeated, all players within a 50-block radius receive the advancement final_adversaries:kill_sunflower
The fight activates only when a player enters a 28-block range.
The boss attacks all entities within a 28-block radius, prioritizing players.
To add custom boss bars, note that the sunflower's hitbox is a slime with the score boss_hitbox set to 4.
Sunflower model is an item_display with score boss_number set to 4

During phase transitions, Lothran moves to this marker. His hitbox hovers 10 blocks below him to prevent damage during this time.

While idle, Lothran periodically scans a 10-block radius around these markers. If a player is detected, it is marked, and the fight begins.

when the fight begins, all players in a 10-block radius to these markers are also marked, to ensure the boss targets all players inside the arena.

General

upon Lothran's defeat, all players within a 250-block radius with in_boss_fight score set to 1 will receive the advancement final_adveraries:kill_lothran, and their in_boss_fight score will reset to 0
The boss arena should avoid large obstacles as Lothran lacks collision detection
The arena floor must be filled with light blocks for Lothran's spinning attack. This can be done easily with WorldEdit by selecting an area with //pos1 and //pos2 and replacing all air blocks with light blocks: //replace air light[level=0]
When Lothran initiates combat, it marks all targets by setting their scoreboard in_boss_fight to 1, Lothran only attacks marked entities and returns to its spawn if none can be found nearby
Multiple Lothrans can theoretically be fought simultaneously, but this may significantly impact performance. Ensure they are at least 500 blocks apart
If multiple instances of the same boss exist, disable boss bars in the settings, as they will display erratic behavior by tracking all bosses' health simultaneously
To add custom boss bars, note that Lothran's hitbox is a slime with the score boss_hitbox set to 1
Players who die during the fight will also have their in_boss_fight score reset to 0
Lothrans model is an item_display with score boss_number set to 1

Final Adversaries Lite