The Demonic Portal is an event in the Anomalous Sector that spawns demons from a portal, infinitely.
The crew's objective is to kill as many demons as possible to reap as much rewards as possible.
The Demonic Portal has a 1 out of 4 chance to spawn. It will spawn at every 30th minute interval, and ends after 25 minutes.
The Demonic Portal has a default demon spawnspeed of 3 per 20 seconds.
This can be sped up to 5 per 20 seconds, depening on how many ships there are inside the Anomalous Sector.
1 ship: 3/20s.
2 ships: 4/20s.
3 ships: 5/20s.
4 ships: 5/20s.
5 ships: 5/20s.
6 ships: 6/20s.
7 ships: 6/20s.
For every demon you kill, you get your reward counter going up.
Your crew is rewarded for a certain amount of kills being made.
1 chest: 20 kills.
2 chests: 50 kills.
3 chests: 100 kills.
4 chests: 170 kills.
5 chests: 250 kills.
5 being the maximum.
It's also worth noting that the chests received from this event will not reduct your Anomalous Sector timer, so it's very good to do events in general.