* <span style="font-size:90%"> '''Stationary boss fight''' - ''The boss remains in one or several specific spots during its attack phase, players will need to go to the boss to defeat them.''</span>
* <span style="font-size:90%"> '''Free-roaming boss fight''' - ''The boss is mobile. Players will be able to aggro them to various areas in the map. If all players are dead or out of range, boss may proceed towards (and attack) the Eternia Crystal.''</span>
* <span style="font-size:90%"> '''Hybrid boss fight''' - ''A mix of both types of boss fight. Bosses will only get to roam in a specific stationed area instead of the entire map.''</span>
{|
| lane_type = Boss
| encounter = Harbinger's Warship Adventures or Prime VII Incursion.
| description = Semi-stationary/free-roaming Hybrid boss fight that adds an additional attack pattern with each passing phase which includes various vicious melee and range attacks. Also utilizes functions of his warship such as firing his cannons at the Core or opening a hatch that vacuums nearby heroes into the brig.
}}
|-
}}
||
{{Enemy Summary
| name = King Aquarion
| lane_type = Boss
| encounter = Aquarion Throne Room 6th wave.
| description = Hybrid boss fight confined to a chamber arena where the King summons Whirlpools, Oceanic Rifts, Freezing Ice Shards and Streaming Water Blasts. When in half health, Kraken Tentacles will be summoned for aid.
}}
|-
|
{{Enemy Summary
| icon = File:Eye_of_Cthulhu_Terraria_Icon.png