ambition

'Look like th'innocent flower but be the serpent under it'

biblical allusion to the garden of eden - referring to LM as the serpent who tempts Macbeth into committing immoral deeds. Hell.
Metaphorical imagery - LM's ambition transpires into evil.
After pleading the spirits to make her have masculine qualities, she now feels like a man and here she emasculates M and sees his feminine qualities.

unsex me here, and fill me from the crown to the toe top-full of direst cruelty!"

soliloquy is a metaphor. It symbolizes her desire to be freed from the perceived limitations of femininity and to embrace the strength and ruthlessness she believes are necessary to achieve her ambitions

"But screw your courage to the sticking-place, and we will not fail."

emphasizes her unwavering determination and willingness to push Macbeth to act, even if it means resorting to violence

"Glamis, thou art; and Cawdor; and shalt be. What thou art promised."

This shows her immediate belief in the prophecy and her determination to see Macbeth become king, driven by her own desires for power