Ophelia LaCroix, Deadeye

When Ophelia LaCroix, Deadeye enters the battlefield or attacks, mill five cards. You may
put one Aura or Equipment card milled this way
onto the battlefield attached to Ophelia.
At the beginning of your end step, sacrifice a permanent attached to Ophelia. If you do, she
deals damage equal to that permanent's mana
value to any target.