According to Norse Legend, the sacred Rainbow Bridge called Bifrost connects Midgard (the realm of humankind) with Asgard (the realm of the Gods). Also known as Asabru (“Bridge of Gods”), Bifrost was magically constructed from fire, water and air…whose quivering and changing hues it has retained. Not only do the Gods use this Bridge to travel to and from the Earth, it also leads to the Urdar Well, situated at the foot of the great ash Yggdrasil, where they assemble daily in council.
Of all the Gods onlyThor, God of Thunder, never passes over the Bridge for fear it might be demolished by his heavy tread and lightning bolts. The Watchman God Heimdall stands guard over over Bifrost night and day. Armed with a trenchant sword, he carries a trumpet called Giallar-horn, upon which he generally blows a soft note to announce the coming or going of the Gods. However, Heimdell is destined to sound a terrible trump at the dawn of Ragnarok…the time the Frost Giants will unite with Surtr to destroy the world. During Ragnarok…the end of the cosmos…it is said that Bifrost, the Rainbow Bridge, will collapse and shatter beneath the weight of the monsters