It seems that Counter Mirror elf spell is reflecting a lot more than 1:1 DMG back at the caster which I thought was the original spell design. I am not 100% sure if this is original spell design but I can say that a destroy doing around 600 DMG is reflecting back nearly 1200 DMG. Also I don't think the reflected spell considers MR, ELE resis or immune buff
The spell is supposed to counter mages, but it seems way too powerful when a sunburst hits me back for nearly 800dmg