What is Tempering in Diablo IV?

Tempering is a Blacksmith system that adds an extra affix on top of an item's rolled affixes. Legendary items only — Mythics and Uniques cannot be tempered. You apply Temper Manuals (recipes) that contain 3-5 possible affixes; one is randomly rolled each time. Each item has 2 tempering slots with 5 reroll charges each.

How do I get Temper Manuals?

Temper Manuals drop from Helltides, Nightmare Dungeons, The Pit, World Bosses, and general endgame content. Manuals come in Magic/Rare/Legendary rarities — higher rarity = better affix pool. Manuals are class-bound when discovered.

What happens when I run out of reroll charges?

When a tempering slot hits 0 charges, the slot is 'bricked' — you cannot change the affix or temper the slot again. Spend a Scroll of Restoration to reset all charges on the item. Scrolls are rare — max 3 per day from the Tree of Whispers.

Diablo IV

Complete guide to Tempering in Diablo IV. Manual rarities, affix pools, charge economy, Scrolls of Restoration, when to temper, when to wait.

Crafting 7 min read

Tempering Guide

By the DiabloBytes team · Updated April 2026

Tempering lets you add a bonus affix on top of your Legendary gear — often the build-defining difference between functional and meta. The tension: every temper reroll costs a charge, and when charges hit zero, the slot is bricked forever without a rare Scroll of Restoration. Disciplined tempering means only pushing charges on items you've already committed to keeping.

Tempering Mechanics

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Legendary items only Mythic Uniques and regular Uniques cannot be tempered.
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2 tempering slots per item Each slot accepts a different manual.
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5 reroll charges per slot Each reroll consumes a charge.
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+1 charge per Greater Affix Max 7 charges on a 4-GA item.
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Class-bound Tempers are locked to the class that applied them.
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Cost Materials + gold. Cheap relative to masterworking.

Manual Rarity

Rarity	Affix Pool	Best Source
Magic	3 possible affixes	Low tier content
Rare	4 possible affixes	NMD T40+, Pit T30+
Legendary	5 possible affixes	Pit T60+, Tormented Helltide

Discipline Rules

◆ Never temper below Level 60 — gear churn is too high
◆ Never temper a low-roll Legendary — pump the GA pieces only
◆ Build a GA-first gear set, then temper the whole set
◆ Reserve Scrolls of Restoration for 4-GA chase items only
◆ Use Rare-pool manuals on finished pieces (smaller pool = better odds)
◆ Accept a "good enough" temper on secondary slots — don’t burn charges chasing perfect

Scrolls of Restoration

Scrolls of Restoration reset all tempering charges on an item back to full. Max 3 per day from the Tree of Whispers, with occasional drops from high-tier content. They stack. Save them for your true BiS pieces — don't waste a Scroll on gear you'll replace in a week.