Which mantra is very powerful?

Could you elaborate on the topic of "Which mantra is very powerful?" I'm curious to understand which mantra you consider to be particularly potent. Is there a specific mantra that is widely renowned for its strong impact? Or perhaps a mantra that holds deep significance in your personal practice? I'm interested in hearing your thoughts on this, as well as any experiences you may have had with the use of powerful mantras. Could you also explain why you believe this mantra to be so effective? I'm eager to gain a deeper understanding of its power and potential benefits.