Unholy Firehound

Plague (Whenever a creature with plague deals
damage to a creature, if the plagued creature is a token,
cast a copy of the spell or ability that created the
plagued creature. If that spell or ability has a target,
the target must be the damaged creature. If the plagued creature is a non-token creature, create a copy of it.)
Whenever another creature named Unholy
Firehound enters the battlefield under your
control, you may deal 1 damage to any target.