Weapon Skill Secondary Attribute Modifier (WSC) is additional base damage, taken from a percentage of certain Stats when performing weapon skills.
The stats vary between weapon skills. Typically, each weapon skill will have 1 or 2 default stats for WSC.

For example, all archery WS have a WSC of STR 16% and AGI 25%, which means 16% of your STR and 25% of your AGI will be calculated as base damage when performing all archery WS.

• There is a variable α(Alpha) which scales down your WSC value as you level up.
  

α for each level (range):

Level Range	Alpha Value
Level 1~5	1.00
Level 6~11	0.99
Level 12~17	0.98
Level 18~23	0.97
Level 24~29	0.96
Level 30~35	0.95
Level 36~41	0.94
Level 42~47	0.93
Level 48~53	0.92
Level 54~59	0.91
Level 60~61	0.90
Level 62~63	0.89
Level 64~65	0.88
Level 66~67	0.87
Level 68~69	0.86
Level 70~71	0.85
Level 72~73	0.84
Level 74~75	0.83

• To calculate WSC with α:
  

Let A and B equal the first and second stat modifier (e.g. STR, VIT)

where A% and B% are the respective modify percentages (e.g. 30%,50%)

WSC = floor (floor((A x A%) + (B x B%)) x α)

See also

• Weapon Skill
• Base Damage
• Calculating Weapon Skill Damage
• Calculating Blue Magic Damage