| /obj/effect/timed_event | Generic system for processing events after a certain time on multiple turfs, and
announcing them together. |
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| /obj/effect/timed_event/scrapeaway | Mapping helper placed on turfs to remove the turf after a specified duration. |
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| /obj/effect/timed_event/destructible | Mapping helper placed on turfs that toggles the destructiblity of the turf after a specified duration. |
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| /obj/effect/sentry_landmark | Allows a mapper to override the location of turrets on specific LZs, in specific placements. If multiple
are placed, it picks randomly. |
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