Weapon systems guide
Anvil choices are the bridge between a base Weapon and a working build. Read the upgrade tree before committing, then test range, MP, cooldown and trigger behavior in the Training Grounds.
Direct answer
Anvil nodes modify the Weapon you already hold during a run. They can add elemental damage, replace a Special action, create a stance, alter dash behavior or complete a status engine. Destiny Inscription can unlock a base Weapon, but Anvil does not replace that meta-progression gate.
Open the current Weapon information in the Journal to inspect available branches before taking an offer. Choose the branch that reinforces the engine already present in your inventory; a flashy late node is weak when its trigger has no supporting Artifact or resource plan.
Training
Test the normal, dash and Special actions against the dummy. Record damage type, range, hit count, MP cost, cooldown, recoil and whether a Touch or status effect actually triggers. This catches the common mistake of stacking elemental bonuses without a Weapon or Artifact that deals that element.
Community reports also mention occasional Training Grounds bugs in older versions. If the room behaves differently after an update, preserve the patch number and test again rather than treating an old video as current frame data.
Upgrade planning
Related guides
Start with the six Weapon guide, compare tier context, and use the stats guide to understand elemental, recovery and defensive effects.
Verification note
Last verified against the supplied Sephiria research set. Version-sensitive claims retain their source version; missing paths, compatibility details, and current balance values are marked To be confirmed rather than guessed. See the site's research sources for the full method.