Weapon Durability
Weapon Durability makes knives, bats, staffs, and sticks you pick up last longer. IGN says it is locked after age 25. The evidence gives no numeric increase, so the supported effect is simply extended weapon life.
How it works
It is selected at a Dragon Shrine and has an age requirement: you must not have passed 25. The supplied evidence does not give its cost or explain how much longer each weapon lasts.
When it helps
Consider it while within its age limit if you rely on picked-up weapons.
Read the supporting references
Skills and Dragon Shrine upgrades in Sifu. Covers named moves, passive upgrades, their documented effects, and supported requirements. Does not compare editions or claim current rankings. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.