Ok so the way I understood the wording was "... if you do, that creature deals damage equal to its power to Cyclops Gladiator". That to me says - deals damage equal to the power of the target card you are attacking. Aka. if I use cyclops gladiator to attack a 2/1 card, cyclops deals 4 damage and the 2/1 card deals two damage to cyclops gladiator.

While I was playing Magic 2014, for some reason, I attacked Unruly Mob (1/1) and it sent my Cyclops gladiator to the graveyard. How does this make sense? Bug?