Dwarven foundry

Dwarven foundry enters the battlefield
tapped.
{t}: Add {r}.
{2}{r}: Until end of turn Dwarven foundry
becomes a 2/3 elemental creature with "Whenever
this creature attacks add an amount of {r} equal to
the number of equipment attached to it." It's still
a land.
Equipment don't become unattached from
Dwarven foundry due to it no longer being a creature.