This altar offering mystery can be found in eastern Vangrinn, near the pools south of Eitri. You’ll need to find 6 Silica to make the offering in order to complete the mystery.
Where to Find the Hofgard Altar
Where to Find Silica for the Offering
As mentioned above the Hofgard Altar mystery can be found in eastern Vangrinn, near the pools south of Eitri, shown in the screenshot below. If you’ve been doing a lot of raiding throughout Svartalfheim and haven’t spent much of your Silica on Hugr-Rip upgrades, you should have plenty to make an offering. If you don’t have enough, just look for areas with a raiding symbol on the map such as those at Afalvat Mylna and Dimm Mylna on the map below. Here you can summon your Jomsvikings to raid the area and acquire Silica with their help.
You’ll be rewarded with a skill point for making the offering.