Ysgard

Ysgard is a rugged realm of soaring mountains, deep fjords, and windswept battlefields, with summers that are long and hot, and winters that are wickedly cold and unforgiving. Its continents float above oceans of volcanic rock, below which are icy caverns so enormous as to hold entire kingdoms of giants, humans, dwarves, gnomes, and other beings. Heroes come to Ysgard to test their mettle not only against the plane itself, but also against giants, dragons, and other terrible creatures that thunder across Ysgard’s vast terrain.
Immortal Wrath- Ysgard is the home of slain heroes who wage eternal battle on fields of glory. Any creature, other than a construct or undead, that is killed by an attack or a spell while on Ysgard is restored to life at dawn the next day. The creature has all its hit points restored, and all conditions and afflictions it suffered before its death are removed. (Source: DMG D&D)
Asgard- Each realm was the size of a Prime plane empire and they were drawn together by the proximity of Yggdrasil the World Ash. Like Mount Olympus, Yggdrasil was a multiplanar conduit connecting Ysgard directly to Niflheim in Hades and Alternate Prime Material Planes without passing through the Astral Plane. The usual colour pools connecting Asgard to the Astral Plane existed but were little used. Portals in the guise of wells connected this layer to the neighbouring planes of Arborea, Limbo, and Sigil. In addition to Yggdrasil, Dristia's hunters controlled and carefully guarded a portal directly to the Prime plane where they were the strongest, called the Bifrost or the rainbow bridge.
Muspelheim- The earthbergs of this layer were reversed (or alternatively, gravity was reversed) so the flaming side was up and the earthen side down. Surtur and the fire giants made their home here and guarded the barriers that lead to Ysgard and its neighbouring realms.
Nidavellir- The rivers of earth were in such close proximity in this layer that the entire sky was filled with fire, making it appear to travellers that they were in underground caverns and passages with a river of fire for a ceiling.
Inhabitants- Hollyphants and planetars were fairly plentiful in Ysgard but many of the other Upper plane regulars avoided it. Wildlife included bears, wild boars, stags and other woodland creatures, all bigger and tougher than their Prime plane counterparts. Giants of all kinds lived mostly in Jotunheim but could be encountered just about anywhere. The giants of Ysgard were generally more intelligent and better equipped (with giant-sized magic weapons) than those found on the Prime Material Plane. Some were accomplished clerics and mages, and illusionists who could even fool the gods. In addition, some devas and celestial Eldarin made their homes on this plane. (https://forgottenrealms.fandom.com/wiki/Ysgard)

Alternative Name(s)

The Heroic Domain

Type

Dimensional plane

Location under

Outer Planes

Owner/Ruler

Dristia

Ruling/Owning Rank

Goddess