Pandemonium Parade

Demons, Devils, and Imps you control have riot.
(They enter the battlefield with your choice of a
+1/+1 counter or haste.)
Whenever a creature you control attacks, Pandemonium Parade deals 1 damage to the
player or planeswalker it's attacking.
Every year, a vast horde of horrors tours the
countryside during the long, dark summer nights.