Oceanic Assault

The Oceanic Assault is an event in Terraria that has a 25% chance to spawn each day after the Moon Lord has been defeated, and a 5% chance for every day after the invasion's first defeat.

Mechanics
The event works by hordes of enemies mindlessly attacking untill 1000 points have been reached. Points are gained by defeating enemies, with each giving a certain amount of points. Once 1000 points is reached, Decurion will spawn, and his defeat will end the event.

The amount of points earned for defeating each enemy is:

Enemies
The event has 7 enemies, 2 minibosses and 1 boss.
 * Sea Swordsman
 * Ocean racher
 * Sharkboy
 * Octopus Rider
 * Whale Summoner
 * Armoured Sharkboy
 * Sea Dueler
 * Eldershell Wizard
 * Crushercrab (Miniboss)
 * The Kraken (Miniboss)
 * Decurion (Boss)