Goat format ruling
Battle-Scarred

Card effect (current official text)Select 1 Archfiend monster on your side of the field to activate this card. Your opponent also pays the same Life Points that you pay for the selected monster during the Standby Phase. If this card is removed from the field, destroy the selected monster. When the selected monster is removed from the field, destroy this card.
Rulings
- If the Archfiend targeted by Battle-Scarred is Set, then the effect of Battle-Scarred disappears and Battle-Scarred remains on the field meaninglessly.
- You can select an Archfiend that doesn't require you to pay LP as a target for Battle-Scarred (such as Summoned Skull, Archfiend Soldier, or Fiend Skull Dragon).
- When your opponent takes control of your Archfiend targeted by Battle-Scarred, then your opponent must pay the cost for the Archfiend, and then pay the cost again because of Battle-Scarred.
- When an Archfiend is equipped with Heart of Clear Water, it is not destroyed if it was targeted by Battle-Scarred and Battle-Scarred is removed from the field.
- If your opponent doesn't have enough LP to pay for Battle-Scarred, nothing happens to your opponent, you must still pay for the cost of your Archfiend, and Battle-Scarred remains on the field.
- If Battle-Scarred and Pandemonium are both applying, neither player has to pay for Archfiend costs or for Battle-Scarred.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.