The Watcher

The Watcher is a boss added in version 0.6 of Reb's Mod. It takes the form of an eye facing forward, and has two phases with a third expert-exclusive phase.

Description
The Watcher is an optional post-Plantera boss summoned using a Cursed Eye. In it's first phase, it appears as a normal eye, appears damaged and bloody in the second phase, and in the expert-exclusive third phase, the eye turns black and demonic.

Attacks
In the Watcher's first phase, it uses the following attacks: In it's second phase, it gets a new set of attacks. It also gains the ability to "teleport" by blinking. In it's third phase, it does not gain any new attacks, but all delays between attacks are removed.
 * Hover above the player while firing projectiles
 * Dash across the player horizontally, then vertically.
 * Dive at the player in a "v" shaped motion
 * Move left and right above the player while randomly firing projectiles down
 * Move around the player in a circle three times, creating rings of projectiles that slowly close in
 * Dash at the player diagonally
 * Hover in place while creating a "wall" of projectiles, sometimes moving
 * Blink to a random position around the player and fire a projectile
 * Blink to a position diagonal to the player and fire a projectile

Drops
The Watcher drops the material Staerite, which is used to craft summon weapons. It additionally drops lenses, black lenses, and two weapons: Lens Flare and Ocular Decimator