One of the first things a new player begins to learn is how powerful removal can be in Limited Magic
The 15 Commons that got the "light and dark treatment" are: Army of Allah, Bird Maiden, Camel, Erg Raiders, Fishliver Oil, Giant Tortoise, Hasran Ogress, Moorish Cavalry, Nafs Asp, Rukh Egg, Piety, Oubliette, Stone-Throwing Devils, War Elephant, and Wyluli Wolf (Source)
In this case, we can easily discard a heavily damaged Gardevoir ex or Charizard ex out of nowhere, and let our opponent weep as theyve wasted all of those turns for nothing
Whether you want to dominate the table or defend against all-comers, CommanderComplete "Elite" decks operate at the highest level
If the target creature is an illegal target, you'll still gain control of the target Equipment until end of turn, but you won't attach it to the chosen creature