Dimensional Rifts

Dimensional Rifts are the primary method of entities to enter this world from their own dimensions . There are three types.
The Various Organizations have recently discovered how to open Rifts by artificial means. 
There are three types of Rifts.
==Ways==
A Way can be opened by most entities with a Threat Level of Moderate and above about one time a day with the exception of Changelings, who can only open them once during their existence, and Daemons, who can open them always irregardless of Threat Level. Ways generally last fewer than five minutes, and are hard to detect.
==Rifts==
Rifts open up randomly; but never indoors/past a threshold, unless a threshold has been breached. They have only been observed to open at night. They close up within a few days but that time can be prolonged by artificial means in possession of the various organizations. Detectable.
==Gates==
Gates are permanent Rifts; often large enough for several entities to pass through at once. The only way to destroy them is to detonate a nuclear device in the dimension from which it originated. Only two have been recorded in human history and the opening of them are considered Extinction level events. Easy to detect.