Any Heirlooms in the "Temporary" section will be recycled for Nullifium on portal. Your Equipped Heirlooms will always stay with you when you Portal, along with any Heirlooms in your "Carried" slots.
Nu is not spent, but dictates how powerful each of your Heirlooms can be!
You can upgrade any Staff and Shield to HALF the value of your total earned Nu. If you are new player make sure that you are playing on the latest server Killing monsters gives you Gold Gold increases the Firestones in the Temple of Eternals Firestones give you more gold after each. The currency to upgrade and replace stats, Nullifium, or Nu, can only be gathered by recycling an Heirloom. Firestone is multiplayer game, so at some point you will need to make a kongregate account to get access to all the features of the game. 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 click a stat to upgrade or replace it. Only equipped Heirlooms give you stats, and you can only have one of each type of Heirloom equipped at a time. Once you've selected an Heirloom, you can Equip, Carry, or Recycle it. You can click on the icon of any Heirloom to select it.
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. Heirlooms are powerful items that can drop with a variety of bonuses and a variety of rarities.