1) As the symbol glows, power courses through you. Authority.
2) Authority! Power courses through you as the symbol glows.
3) Power courses through you as the symbol glows. Authority!
?

Yeah, like this. Also with different emphasis on certain words.
Or maybe a whole other voice will announce it?
" Your Tadpol squirms in its trance. It feels this creatures submissive mind. "
" Another one who has sold out his soul to you in service to the Absolute, stands before you. "
" You feel this one believing in the Absolute and now you too can be its master. "^
And some choices are veeeey overlordish too, like ordering someone to commit suicide or fight for you against their former friends and allys.