Abyss Wraith

Summary
Abyss Wraith is the final boss of the Aquatic Event. It appears at Wave 18 and has 650k health (1.25m in total). Abyss Wraith is quite slow, though it has summoning and offensive capabilities that will aid it in battle. There are two phases to the boss. Both phases have no difference in speed and health.

Abyss Wraith's rage phase activates once its health goes down to 50k, fully regenerating its health back and having its speed decreased.

Strategies

 * Due to the boss' high health, it is recommended to use towers that can output high damage such as Spectrum Minigunner and Gunslinger.
 * It is recommended to use towers that have unlimited range, like the Railgunner as it is capable of hitting Abyss Wraith from anywhere across the map.
 * Abyss Wraith is likely to get out of range of your towers, it is advised that you relocate them where they will be able to attack.
 * You can use the Flamethrower in order to slow down the boss and its spawns.

Trivia

 * The Abyss Wraith has the highest overall healthpool in the game.
 * The second phase often deceives players playing the event for the first time, therefore underestimating the amount of damage required to be dealt.