Cavalcade of Calamity is a uncommon Enchantment card from Ravnica Allegiance (RNA), collector number 95. Current market price: $0.29 (foil $2.11), TCGplayer market prices via Scryfall.
Whenever a creature you control with power 1 or less attacks, this enchantment deals 1 damage to the player or planeswalker that creature is attacking.