Crafting
Tempering
Add a chosen affix from a manual at the Blacksmith.
What it does
Tempering adds an affix of your choosing to a piece of gear. You pick a manual, the Blacksmith rolls one of the affixes inside it, and that affix sits on the item alongside the ones it dropped with.
Each item carries one temper, so it should be the stat your build leans on hardest. In a UniqueDrop guide it is the line shown under Temper on each item.
Getting started
Tempering opens as soon as you have reached the Blacksmith and picked up your first Temper Manual. Manuals start dropping from level 30.
Attempts
Every item shows a Tempers counter on its tooltip, such as 3/3. Each attempt uses one, whether or not you like the result, and when the counter reaches zero the item cannot be tempered again.
The six manual categories
Every manual belongs to a category, and each category only fits certain slots.