Tyrannicaldemeanor, imperatives, foreshadowing, ambiguousness, ephemeral sense of security, invincibility, excessive bloodthirst, heinous acts.
Macbeth's hubris is explicit as he enters, he speaks with imperative phrases such as "tell me" and "call 'em" - he is driven by greed and hunger for power.
This is the first time Macbeth has intentionally encountered the witches, reinforcing his abandonment of resisting evil.
He no longer can pretend himself to be scrupulous (moral), he now embraces his tyrannical demeanor.
Macbeth threatens the witches with an "eternal curse" which is ironic as we have all seen the witches' overt supernatural power, he believes he can supersede this.
The apparitions give Macbeth an ephemeral (temporary) sense of security and invincibility.
Yet he still plots to kill Macduff ("thou shalt not live") exposing how he is now driven by a thirst for blood and violence rather than fear and ambition.
Conversely, it is intentional that Macbeth does not carry out the murder of LadyMacduff and her child himself, as it ensures he is somewhat redeemable from the epitome of evil.
This is vital in constructing the play as a tragedy as a tragic hero must be able to elicit some sympathy from the audience, despite their flaws.