Identify the technique? (1 Viewer)

[MATHmaster]

I really need help identifying this language technique in Othello:

Please help me out!

"Ay, let her rot, and perish, and be damned to-night; for she shall not live" (Act 4, Scene 1, Lines 174-176)

OR

This is the whole quote (I only want to use a bit of it so I don't have a long quote):

"Ay, let her rot, and perish, and be damned to-night; for she shall not live: no, my heart is turned to stone; I strike it, and it hurts my hand. O, the world hath not a sweeter creature: she might lie by an emperor's side and command him tasks" (Act 4, Scene 1, Lines 174-178)

Thanks guys!!!

 

[Eg155]

juxtaposed ideas: "let her rot" and "hath not seen a sweeter creature"
Also, i think this is the act when Othello loses his psych just a bit... so depleted tone conveying a duplicit persona.

 

[RivalryofTroll]

Tautology in a sense? (Perish + Rot)
But Eg155's answer seems more legit LOL