Abyssal Filaments

Filaments are the keys to Abyssal Deadspaces. Activating a Filament will draw the ship it was used on into the Abyss, leaving an Abyssal Trace behind. While no other ship can follow the trace into the Abyss, these traces can be scanned out with combat scanner probes. As such, it may happen that other capsuleers are waiting for the ship that entered the Abyss to emerge again.

The information available on Filaments gives hints at what to expect within the Abyssal Deadspace it will lead into, such as global weather effects within the Abyssal Deadspace and the effects on the ships in it:

Dark -  reduces weapon ranges but enhances ship velocity.
Electrical - reduces EM resistance but enhances ship capacitor recharging.
Exotic - reduces kinetic resistance but enhances scan resolution.
Firestorm - reduces Thermal resistance but enhances ship armor strength.
Gamma - reduces explosive resistance but enhances ship shield strength.