Sludge Hound of the Smelt

When an artifact you control is placed in a graveyard from the battlefield, place a +1/+1 on Sludge Hound of the Smelt.
{p/r}{t}: Destroy target artifact, place a +1/+1 counter on Sludge Hound of the Smelt.
{p/r}{p/r}{p/r}{t}: Deal 1 damage divided between target players and creatures for each +1/+1 counter on Sludge Hound of the Smelt