Ushgrahmin, Bane of Metals

Trample, reach, flash
{2}{g}, {t}: Destroy target artifact or enchantment.
{x}{g}{g}{g}, {t}: Look at the top X cards of your library. You may put any number of permanents with converted mana cost X or less from among them onto the battlefield. Put the rest into your graveyard or back on top of your library in any order.