Tholians can emit an energy field shaped much like a web, which can trap anyone or anything inside and draw it close. The Tholians appear to actively explore the science of inter-spatial rifts and time travel. Tholians from both the regular Trek universe and the Mirror universe are depicted as engaging in missions to capture future technology, ostensibly to use the advanced technology to further their own agenda.

Triggers:
web0 = off
web1 = effect 1 on
web2 = effect 2 on