Uncivil Unrest is a rare Enchantment card from Secret Lair Drop (SLD), collector number 2008. Current market price: $19.10, TCGplayer market prices via Scryfall.
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.