You control the monster, but the damage is calculated based on the original owner.
* The monster you control will attack as if it were still on your opponent's side of the field.
* The attack damage will be calculated as if the monster were still your opponent's.
* If the monster's attack power is lower than the opponent's monster's, the damage you take is equal to the difference.
Example:
* Your opponent has a monster with 2000 attack.
* You take control of their monster with a card like "Mind Control."
* You attack your opponent's monster with 1500 attack.
Result: Your opponent takes 500 damage (2000 - 1500 = 500).
Key Points:
* You control the monster's actions, but not its inherent stats.
* The game still considers the monster's original owner for damage calculation purposes.
* This means you can potentially "backfire" if you take control of a strong monster and attack a weaker one.
Let me know if you have any other Yu-Gi-Oh! rules questions!