how to add something by the speed of light in powerscaling?
In power scaling, adding something by the speed of light would mean multiplying the power or ability of that thing by the speed of light.
For example, if a character has a power level of 100 and you want to increase it by the speed of light, you would multiply 100 by the speed of light (approximately 299,792,458 meters per second) to get their new power level.
So, their new power level would be 100 x 299,792,458 = 29,979,245,800.
Keep in mind that this is a theoretical concept and may not always make sense in the context of power scaling in fiction.