Cloaking device

Cloaking device is a item that turns entities invisible. Its duration can be extended.

=Obtaining=

Mob loot
Slavers have a chance to drop cloaking devices, but only when they die while using them.

=Mechanics= Cloaking device causes its user to disappear from view although it's still present.

Certain features of entities are not affected by invisibility:
 * Any armor worn
 * Held items
 * Any slugs stuck in players
 * Any particles being emitted