Using crafting in Diablo IV to Diablo 4 Items fine-tune your gear is an essential step to perfecting your character's build. Crafting systems like Tempering and Masterworking allow you to further enhance your items, improve their affixes, and fine-tune them to match your playstyle or current needs. Here's how you can make the most of these crafting systems:

1. Tempering: Enhancing Base Stats
Tempering is applied at the Blacksmith and is an important first step before moving on to Masterworking. This crafting step adds Tempers to your items, which modify their base stats and can improve your gear's overall power. You can apply up to two tempers to each item before moving on to Masterworking.

How Tempering Works
Tempering Manuals drop randomly as you play the game. These manuals come in six categories:

Weapons (Improves weapon-related stats like damage, attack speed, etc.)

Offensive (Boosts stats like attack damage, critical hit chance, damage multipliers, etc.)

Defensive (Increases armor, resistances, etc.)

Utility (Adds effects like health regeneration, life per hit, resource cost reduction, etc.)

Mobility (Boosts movement speed or adds mobility-related bonuses)

Resource (Improves resource generation or cost reduction, such as for Mana, Fury, etc.)

How to Use:

Select an item that you want to upgrade.

Choose a temper from the categories based on the desired stat boost. For example:

If you need more damage, use Offensive Tempers to increase Critical Hit Chance or Damage.

If you're struggling with survivability, apply Defensive Tempers to increase Armor or Vitality.

Apply two tempers to the item, which will increase the stats or add bonuses.

Example: If you're playing a Rogue and want to increase damage output, you might apply Offensive Tempers to boost Critical Hit Chance and Attack Speed. This gives you more opportunities for high-damage crits while making you attack faster.

2. Masterworking: Advanced Upgrades for Final Power
Once you've tempered your item, you can move on to Masterworking. Masterworking is the final step of crafting that gives your items special upgrades, further improving their stats or adding powerful effects.

Masterworking enhances an item beyond the regular crafting system. Once you apply Masterwork upgrades, the item becomes untradeable, meaning it's permanently tied to your character.

How Masterworking Works
Before Masterworking, an item must have two tempers applied. Only then can you Masterwork the item.

Masterwork Upgrades are typically more powerful than regular crafting upgrades, and they come with permanent stat boosts. These boosts can range from damage increases, resource generation, defensive bonuses, or life-related bonuses.

Masterwork Categories:
Weapon Masterwork: Adds major upgrades like increased weapon damage, attack speed, or special effects (like dealing more damage to Elites or Bosses).

Armor Masterwork: Enhances defensive stats such as Armor, Resistances, or Vitality. You might also get bonuses like damage reduction or life regeneration.

Accessory Masterwork: Accessories can be Masterworked for utility upgrades, such as resource cost reduction, cooldown reduction, or damage mitigation.

How to Use:

Choose a Legendary or Unique item that has been tempered (with two tempers).

Select the Masterwork option in the crafting menu.

Choose the Masterwork upgrade based on your needs:

If you're aiming for more damage, you might choose a damage increase or crit multiplier.

If you need survivability, focus on armor or resistances.

Apply the upgrade, and the item will now be enhanced with significant power increases.

Note: Once Masterworked, the item becomes untradeable, so you want to buy d4 mats make sure it's the right piece before applying the upgrade.