In "Othello", Iago warns, "O! Beware, my lord, of jealousy", it is this creature
... Iago: O, 
beware, my lord, of jealousy; It is the green-ey'd monster, which doth mock [DOC] [TLE] Act Three - Othello and Chill - Othello and Chill - Home [PAR] How does Iago engineer the first suspicious behavior between Cassio and 
Desdemona in Act 3?