Molten elemental

trample
{r}{t} sacrifice an artifact: put X+1/+1 counters
on molten elemental, where X is 1 plus the
artifacts converted mana cost.
whenever molten elemental deals combat damage
to a player destroy target artifaict that player
controls, then put X+1/+1 counters on molten elemental, where X is 1 plus the artifacts
converted mana cost.