You may find yourself wondering what the material cost of rerolling is. Iron Bits cover the Inventor’s fees, but the Dynamite does not work too well if you want to keep what is left. For Rerolling, you will need to gather the Ashes of Awakening.
This rare material will most commonly be found in the new Ascendant Mode, but you will be able to entice their drops in lower difficulties with the use of the Ascension Altar. Incidentally, you may find yourself wanting to gather this new material if you are interested in awakening Epic items, but more on that later!