Perony Yessam, Perfect Maid

Whenever this creature blocks another one and survives until end of the combat, draw a card.
Additionaly, you may pay an additional {w/u} mana to cast it. If you do so, whenever you draw an additional card, you heal 1 point if you paid with {w} mana or you scry 1 if you paid with {u} mana.