So my question is the card backlash tap untapped creature. It deals damage based on its power to its controler so can i tap a enemy commander and it deals damage to that opponent and he have commander damage?
Only combat damage counts as commander damage. Damage through the effect of any spell or ability is never combat damage, not even if the commander is dealing damage equal to its power.
Only combat damage counts as commander damage. Damage through the effect of any spell or ability is never combat damage, not even if the commander is dealing damage equal to its power.