Heirlooms are powerful items that can drop with a variety of bonuses and a variety of rarities. You will earn one Heirloom every time a Void Map is completed, and you have a better chance to get higher rarities if you complete the Void Map at higher zones. Once you have an Heirloom, you can click the icon below to select it.
Once you've selected an Heirloom, you can see all of its stats on the right side of this screen. You can click a stat to upgrade or replace it. The currency to upgrade and replace stats, Nullifium, or Nu, can only be gathered by recycling an Heirloom. You can also click on the Heirloom's name on this menu to rename it, or click on the icon to change it!You can upgrade any Staff and Shield to HALF the value of your total earned Nu. Nu is not spent, but dictates how powerful your Heirlooms can be!
You can only carry a few Heirlooms (other than the two you have equipped) back through the Portal with you when you use it. Any Heirlooms in the "Temporary" section will be recycled for Nullifium on portal.