Infernal Compasses are 'keys' to access the Infernal Hordes, a wave-based arena battle available from World Tier 3 on both Seasonal and Eternal Realms.
You get your first Compass when entering World Tier 3 and completing the Questline "The Eyes of the Enemy" in Zarbinzet (Map). A Tier 1 Compass will be rewarded to you.
Infernal Compasses come in different Tiers presenting an increasingly difficult challenge in the Infernal Horde. Only Tier 1 is available in World Tier 3. You need to be in World Tier 4 to access higher-tier Infernal Hordes.
Infernal Compasses can be found or crafted:
- Endgame Bosses
- Helltides
- Nightmare Dungeons
- Whispers
- Occultist - By crafting Sigil Dust
Right-click to activate the Compass in the Consumables tab of your inventory, and select the Dungeon highlighted on the Map and you'll transported directly there.
They can be upgraded to a higher tier by using an Abyssal Scroll or by crafting them at the Occultist from Sigil Dust.