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Weapon customization

EX-Mod Synthesis Guide

Build a four-effect weapon by combining same-type drops, choosing donors carefully, and matching EX-Mods to your real combat loop.

Updated July 11, 20268 min readLow spoilers
EX-Mods can move only between matching weapon types.

Synthesize a target sword with a donor sword, or a dagger with a donor dagger. The donor is consumed, and the resulting weapon can retain up to four selected EX-Mod effects when the available slots allow it.

What EX-Mods do

EX-Mods add randomized effects such as changing Stamina economy or improving normal attack output. They are one of the reasons a lower-level drop can remain valuable even when its base parameters are worse than your equipped weapon.

How synthesis works

  1. At the Smithy, open synthesis.
  2. Select the weapon you want to keep as the target.
  3. Select a donor from the same weapon family.
  4. Review the combined pool of effects.
  5. Select up to four effects that support the target build.
  6. Confirm only after checking that the donor has no unique value you still need.

Build around an action loop

Four individually strong effects can still make a weak build if they reward different actions. Start with one loop and make the effects cooperate.

Build directionEffects worth prioritizingPairs well with
Normal attack pressureAttack output, Stamina efficiency, survivabilitySword, Rapier, Dagger
Sword Skill burstSP economy and skill-related damageA three-skill punish loadout
Guard and parryDefense, Stamina support, post-parry valueShield-compatible weapons
Heavy commitmentStamina, damage reduction, charged or heavy outputTwo-Handed Sword or Axe

Donor triage after every quest

  • Keep: rare or build-defining EX-Mods for your main family.
  • Synthesize: a donor that improves the current four-effect package.
  • Enhance: ordinary duplicates with no useful effect.
  • Sell: surplus drops when Col is the immediate bottleneck.
Make the target choice first. Synthesis destroys the donor, so selecting the wrong direction can consume the weapon you meant to keep.