Krampus, Festive Punisher

If a creature an opponent controls deals damage
to you, it also does that much damage to its controller.
When Krampus, Festive Punisher enters the battlefield destroy all artifacts and enchantments,
any player may take 6 damage to prevent this
from happening to their permanents.
"Me, I say too much optimism will get you killed."
- Krampus