Adds 7 possible artifact effects

Created by: Sprok0

Adds 7 new possible effects for large artifacts to be generated with. The effects added are:

Stops time around it Fires projectiles in random directions around it Cultifys turfs/windows/grilles in a small or fairly large radius around itself Generates an anti-light area while active Pulls objects toward itself Fully fills a person's reagent vessel for a duration Revives a nearby dead person, but turns the toucher into a shadowperson

Adds a generic projectile firing proc for future use Allows artifact batteries to copy any variable needed from an artifact effect