what if a lawyer is misusing his power and position

Your are making onlly a hypothetical query. 

disciplinary action  on lawyers/advocates, takes by bar councils of concern states. 

If a lawyer is misusing their power and position by filing wrong cases or threatening to file a lawsuit against someone, the affected person can take the following actions:

1. File a complaint with the Bar Council of the state where the lawyer is registered.
2. File a complaint with the police, if the threat is severe or the lawyer has committed a crime.
3. Hire another lawyer to counter the wrong allegations or seek legal advice on how to proceed.

It is important to note that if a lawyer is found guilty of misconduct, their license to practice law can be revoked by the Bar Council Terraria.. Therefore, it is recommended to report any such incidents to the appropriate authorities.