Unellar , Starforged Blade

This artifact cost {1} less to cast for each Aura
and Equipment you control.
When Unellar, Starforged Blade enters the battlefield, put a star counter on each
Equipment and Aura you control.
{3}: Put a star counter on target permanent.
{7}, Sacrifice Unellar, Starforged Blade: Destroy
all non-lands permanents without a star counter
on it. Activate this ability only any time you
could cast a sorcery.