If your goal is to show power, learn to speak in a more powerful way.
Imagine the contrast between a teenager speaking and the emphatic tone of a judge delivering a verdict.
Pause for 1-2 seconds between sentences, and sometimes even in the middle of them.
Drop your intonation.
Always drop your intonation at the end of the sentence. Imagine a judge saying, “This case is closed.”
Check your breathing.
Breath deeply into your belly. Inhale and exhale through your nose.