- 0 Skill pt appears to be +1 to +3.
- 1 Skill pt appears to be +2 to +5.
- 2 Skill pt appears to be +2 to +5.
- I suck at spading.
Based on my own fussing with the skill it gives +2 damage for 30 minutes with no skill points. Beyond that for each skill point you receive an additional +1 damage as well as an additional minute of the effect per casting. So when it is maxed you're looking at +12 damage with a 40 duration per cast. --Valmo 20:51, 9 August 2011 (PDT)