Ghost Droid

The Ghost Droid is a hostile droid first found at Mount Whirl.

Appearance
The Ghost Droid is green and slightly transparent, but the helmet is a solid green.

Its 2.0 and 3.0 counterparts appear similar to the original variant, but 2.0 is red while 3.0 is dark blue.

Behavior
When it is aggroed by a player, either by entering its aggro range or using a ranged weapon, it will turn invisible, only turning visible again when attacked during that state.

Combat Tips
Ghost Droids have moderate health but can potentially deal a lot of damage. You should never let the Ghost Droid catch you off-guard.

If you can estimate the speed of the Ghost Droid well, it will allow you to attack it when it is close but not yet touching you.

If the Ghost Droid spawns along with other droids, you can use the other droids as a gauge to estimate where the Ghost Droid is.

Look out for the tiny particles that the Ghost Droid emits if you've lost track of it. High graphic settings increases the amount of these projectiles.

When it is chasing you, the Ghost Droid can be revealed early by hitting it with a projectile. Crossbows are better for this as they fire arrows in a straight line, while slingshots fire in a parabolic trajectory.

Trivia

 * For a brief moment after the Ghost Droid first spawns, if a player is in its aggro range the Ghost Droid will pursue the player without turning invisible.
 * If the Ghost Droid is hit with a ranged weapon by a player it cannot pathfind to, it will not react to being hit.
 * If a Ghost Droid gets the Leaking modifier, it will continue to leave a path while it is invisible, making it a practical joke to fight.