Be upfront in Rule 0
Bite of the Black Rose Coercive Portal Crdan the Shipwright Elrond of the White Council Galadriel, Elven-Queen Magister of Worth Mob Verdict Plea for Power Sail into the West Split Decision Truth or Consequences Tyrant's Choice
Although it can't prevent combat damage that would be dealt to your planeswalkers, it can still prevent noncombat damage that your opponent would want to redirect from you to one of your planeswalkers
Its common to find these effects stapled to creatures themselves, which are colloquially known as aristocrats thanks to a heater from Tom Martell
Purphoros, God of the Forge is another damage dealer in this vein, but is far more specific to token based strategies, with Terror able to slot into many more archetypes and provide meaningful removal to boot
If the die lands on the chaos symbol, however, a special condition on the card activates, affecting the game for every player involved
