Archaion: Echoes of the Fallen

Last of Deepslate Tweaks
Added 3 new phase-based Boss Tracks (Made by Primal Xenolith!)
Added random target selection AI for the Last of Deepslate.
4 Echo Charges are now needed to wake the boss up.
Added more delay to the Ground Smash attack. Applies a special area attack pattern after the main attack.
Added more delay to the Body Slam attack.
Reduced overall damage multipliers for some attacks.
Animated the boss' bossbar.
Reworked dynamic damage calculations to reduce high burst damage, which is now also based on the amount of players present in the arena.
Undid the Roll attack's furthest player priority now that the boss can switch to random targets from time to time.
Many stats of the boss are heavily tweaked.
Melee attack applies Armor Break I, an armor and protection reduction effect, on the player during Phase 1 of the Archaic raid, otherwise applies Armor Break II effect during Phase 2.

Last of Deepslate Tweaks:  The Archaic Raid
Added charged variants to Wights, Slateds, and Sentinels. They are now summoned alongside the Brave during the Last of Deepslate fight. They are the Archaics as a group.
Brave spawner projectiles are removed. Last of Deepslate now call the Archaics twice during battle, calling when it first reaches 50% HP, then when it reaches 50% again after full recovery.
Added charged Archaic and boss phase indicators to the boss' bossbar.
Made the roll ability only trigger after Phase 1 of the Archaic raid.
Added an extra effect to the arm slam attack when during Phase 1 of the Archaic raid.
Added an extra effect to the body slam attack when during Phase 2 of the Archaic raid.

Misc
Added the new Grimoray entity with 3 different variants.
Echo Stars are now rarer in Vault Loot Tables
Added multiple new rooms to the Ancient Keep
Fixed one of the rooms having an almost impossible vault to reach.
Added ambient particle effects and colored fog to the structure.
Buffed stats of the Echo Mace item and the Echo Mace projectile.
Trial API refactor
Adjusted loot tables for better balancing
Sentinel's Wight pickup radius: 5 → 6 blocks
Echo Charge projectile damage: 12
Reworked Water Room
Reworked Grate Room
Reworked Main Hallway

+ much more!