[dice=Black Blade Scimitar Attack (Power Attack, Pool +2 & Keen, Spell Combat)]1d20+17-2+2-2[/dice]
[dice=Black Blade Scimitar Damage (Power Attack, Arcane Strike, Pool +2 & Keen)]1d4+11+4+3+2[/dice]
Iterative
[dice=Black Blade Scimitar Attack (Power Attack, Pool +2 & Keen, Spell Combat)]1d20+12-2+2-2[/dice]
[dice=Black Blade Scimitar Damage (Power Attack, Arcane Strike, Pool +2 & Keen)]1d4+11+4+3+2[/dice]