Zou Kang (New Earth)

Psychokinesis: Thundermind had high-level mental abilities stemming from Tantric Buddhist mysticism. Thundermind is a "Bodhisattva," which means he has the powers listed in the Buddhist siddhis, which include everything from super-speed to flying to the ability to increase or decrease his size. He has also been said to have a type of telepathy and extra-sensory perception.
When Zou Kang utters the phrase 'All hail the jewel in the lotus,' he is physically transformed into Thundermind.

Notes

According to Tony Bedard in an interview, Thundermind leads a double life. When he's not Thundermind, he's a nebbishy school teacher who is in love with fellow teacher Ms Wu, who only has eyes for Thundermind. In his heroic guise, he's the most popular and beloved member of the Great Ten -- bright and telegenic, unfailingly polite and possessing a multitude of powers. He's also a reflection of his own culture, especially of the Buddhist tradition. His superpowers are actually "siddhis" or Buddhist supernatural abilities, and they stem from an ancient scripture he translated which contained his magic phrase or mantra, 'All hail the jewel in the lotus.' That phrase is to Zou Kang what 'Shazam' is to Billy Batson. When he utters it, he's transformed.
Identity is known to government officials.