Bizen, Patient Priest

When Bizen, Patient Priest enters the battlefield
or attacks, you may search your library for a aura
or equipment card and put it onto the battlefield
attached to Bizen, then shuffle your library.
{x}{g/w}{g/w}: Attach any number equipment
with total mana value X or less to Bizen, Patient
Priest, then deal damage equal to any target equal
to the number of cards attached to Bizen.