- ""Bifröst" is believed to mean "shimmering path." The bridge is also called "Asbru," the Æsir's Bridge"
- ― Bifröst
Bifröst is a tile originally introduced in the Campaign before reappears as titular challenge in Conquest Mode. It is a location built by Gods of Asgard as with Seal of Valhalla.
Rig and his companions must protect Bifröst from Hvedrung and his Eldthursar army.
The inactive Bifröst appears in the titular Challenge where the player(s) must colonize the tile containing it, and then restore and defend Bifröst until the time runs out.