Uncivil Unrest [Secret Lair Drop Series] Karn Whenever another nontoken legendary permanent

Whenever another nontoken legendary permanent enters the battlefield under your control

Reverse Type: Legendary Artifact — God // Legendary Artifact {T}: Target player loses 3 life unless they sacrifice a nonland permanent or discard a card

or Ebon Praetor

[I] [II] Destroy up to one target nonland permanent

Sacrifice Centaur Garden: Target creature gets +3/+3 until end of turn

Uncivil Unrest [Secret Lair Drop Series] Karn Whenever another nontoken legendary permanentSet: Secret Lair Drop Series Type: Enchantment Rarity: Rare Cost: {4}{R} Nontoken creatures you control have riot. (They enter with your choice of a +1 +1 counter or haste.) If a creature you control with a +1 +1 counter on it would deal damage to a permanent or player, it deals double that damage instead. The mob had only one rule: Never stop dancing.