Dark Souls II: Scholar of the First Sin · Weapon upgrade path
Boss weapon reinforcement
Boss Soul Weapons use Petrified Dragon Bone and gain base damage at a larger per-level increment, with a +5 cap.
How it works
The upgrade description states that boss weapons increase physical base power by 30% of initial value per level and stop at +5, yielding 150% above initial base damage in the source’s account. Attribute scaling increases with upgrades. Another source lists Petrified Dragon Bone as the material for boss equipment through +5. Elemental damage on weapons with innate elements may follow separate increases.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.