User blog:TerrariaBEAST64590/The Terminator ADDED INFO

The Terminator has 100000 total health and appears in the Time Invasion after Skeletron Mech has been defeated.

The Moon Lord must have been defeated before the Terminator in order for it to spawn, and you can also use the Sigil of Termination, crafted with a Celestial Sigil and an Excalibur.

Individual HP Amounts:

Each turret: 25000 HP

Main body: 50000

The Terminator resembles an Eye of Cthulhu with two turrets on it.

The projectiles it shoots are: Termination Ray (500 Damage) Overbullet (100 Damage)

The Overbullet has 200 health, so you can destroy it before it gets to you

Drops: One of the 5 will always drop

Lunar Portal Staff 25% Chance

Meowmere 25% Chance

Influx Waver 25% Chance

Solar Eruption 10% Chance

Breaker Blade 15% chance