Ysgramor's Birthright is a light armor set. The 5-piece set bonus adds 400 Spell Damage to your Frost Damage abilities.
Ysgramor's Birthright is part of the base game and drops in The Rift in the Overland content. You can also find it on Guild Traders. Each set item is bound on equip. You can acquire light armor, jewelry and weapons for this set in the Nord motif style.