Slimepocalypse

The Slimepocalypse is an event that is comprised of a series of waves of enemies that eventually leads to an extremely hard boss, even with good post-ML items such as the Mystical Staff.

It comprises of a total of 20 waves, going against regular events with 15 waves. Once it is started, it cannot be stopped. Each wave lasts 15 + its wave number seconds except for boss waves, which last until the boss is defeated.

Wave 1: Yellow, Purple, Black, and Red Slimes.

Wave 2: Now spawns Terra Slimes.

Wave 3: Does not spawn Red or Yellow Slimes, spawns Crimslimes.

Wave 4: Summons Radiation Slimes.

Wave 5: Summons just one Eradication Slime.

Wave 6: All waves at once, but with much higher spawn.

Wave 7: Spawns King Slime.

Wave 8: Triggers Slime Rain, and spawns more rapidly.

Wave 9: Summons Sun Slimes.

Wave 10: Boss Wave, summons one Armageddon Slime.

Wave 11: All waves at once.

Wave 12: Summons Wyverns, but they explode into King Slimes once defeated.

Wave 13: Drops various slimes from the sky.

Wave 14: Every ordinary slime is either a King Slime or an Armageddon Slime.

Wave 15: Boss Wave, summons one King Tyrant Slime.

Wave 16: All waves at once, boosted spawn rate.

Wave 17: All Wyverns become King Tyrant Slimes, boosted spawn rates.

Wave 18: All non-King Tyrant Slimes are now King Tyrant Slimes.

Wave 19: Massive spawn rate boost.

Wave 20: Final Boss: Terrarian Slime.

The event becomes extremely difficult towards the end.

Beating the event and gaining its valuable loot requires vigorous training.