Arches of Ulloch

Only fools step through Ulloch’s gates. They lead to nowhere a wise person wants to go.

— The Cartographer

Two ornate, black arches dominate the scorched landscape for miles, each one rising two hundred feet into the stiflingly hot air. Every inch of stonework is engraved with images of devils waging war against demons.

Description

Characters who use a detect Magic spell or similar magic to examine the arches discern a powerful aura of Conjuration magic around each one.
When a creature approaches within 100 feet of either arch, the stonework emits a loud, resonant hum that grows louder and higher in pitch as the creature draws closer. As a creature passes through an arch, a roaring sheet of flame fills the archway, teleporting the creature to another location in the Seven Hells. Any creature or object that passes through the arch while the portal is open is transported to the same destination. Each arch is wide enough to accommodate entire regiments.
To travel to a specific destination, a creature must have visited it before or be able to point to its location on a map. If the characters fail to pick a destination, determine it randomly.
The portal remains open and fixed to the same destination for 10 minutes, after which it deactivates as the arch that created it crumbles and falls to the ground.

History

In forgotten times, the Archdevil Aaron used these twin arches to transport entire regiments to other planes of existence to fight in the Celestial War. The arches’ magic has waned significantly after an attack from the angels, but there’s still enough magic left in each one to transport creatures to another location in the Seven Hells.