Ysgard (rune)

Ysgard was a type of giant rune and was considered one of the most powerful.

Effects
Once activated this rune was said to create in place of its doorway a temporary portal between Toril and Annam All-Father's crystal palace Gudheim in Jotunheim. Once closed, this portal could not be re-opened from the Outer Planes.

The number of minutes in which this portal remained open was equivalent to the level of the runecaster that activated it.

Components
Like most giant runes it required no material components to cast, though the caster needed to know the giant rune Annam's unblinking eye. The process of shaping this rune could take anywhere from one to six weeks and it needed to be enscribed upon a closed doorway.