I believe the answer is opium
Answer:
"Gives thy pen both skill and argument,"
"Spend'st thou thy fury on some worthless song,"
"the ear that doth thy lays esteem,"
Explanation:
Benvolio then suggests that Romeo should try to get over Rosaline by going to the ball and looking upon “all the admired beauties of Verona” (I. ii. 85). Benvolio insists: “Compare her face with some that I shall show, / And I will make thee think thy swan a crow”
hope this helps :)