Archfiend Arsonist

Reach, Purge (Whenever this creature blocks or
becomes blocked by a creature, this creature deals 1
damage to that creature.)
When Archfiend Arsonist attacks, put a blaze
counter on target land defending player
controls. As long as that land has 3 blaze
counters on it, it has "At the beginning of your
upkeep, this land deals 1 damage to you."