Lantern against the Night
The interests of Lophiiformes are at odds with those of the Swarm of Eternal Night, one thing he calls on his vassals to do is to eliminate them.
Warlocks who have Lophiiformes as their patron are prefferred targets of the Swarm of Eternal Night. However, once per round the dark powers of Lophii allow such a warlock to do additional 1d6 force damage on one successful melee, ranged, or spell attack against any standard creature of the Swarm of Eternal Night.