Ark's Mod/Watcher

The Watcher is a Hardmode boss fought anywhere after Golem has been defeated.

Spawn
The Watcher spawns by using a at any time.

Phase 1
The Watcher does the same tactic for phase 1:

Hover and shoot, Fly across player, Orbit player and shoot, Move back-and forth above player and shoot, Swoop at player

Once The Watcher has taken more than 2500 damage it's damage will increase by 25

Once The Watcher has taken more than 10,000 damage it's damage will increase by 20 and defense by 20

Phase 2
The Watcher when in phase 2 changes it's tactic:

Hover and shoot, Fly across player, Orbit player and shoot, Move back-and forth above player and shoot, Swoop at player, Blink around player and shoot, Fly above player and shoot, Teleport to corner and shoot, Teleport to corner and fly across player

It also randomly circles around the player and shoots lots of projectiles to trap the player