Should I add the 'by'? Pharaun and Ryld pressed on and discovered a group of renegade male drow who were planning a hostile takeover of Menzoberranzan (by) using the thousands of kobold, goblin, and bugbear slaves of the city as their army.
Top answer
By is okay; I'd probably just use a comma.
— Philip
By is okay; I'd probably just use a comma.
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