The phrase "similar power" refers to having a level or degree of ability, strength, influence, or authority that is comparable to someone else. It means possessing something in common with another person or thing, such as being able to perform tasks or achieve goals at the same capacity or standard. The term can be used in various contexts, including describing two people who have similar abilities, skills, or qualities; comparing the strength of different forces or entities; or referring to the equivalence between two things that are alike in nature or function.