Naora, Wielder of Light

Whenever you cast a white spell, you may pay
{2}. If you do, draw a card and put a +1/+1
counter on Naora.
{6}{w}{w}: For each creature blocking or blocked by
Naora this turn, its controller sacrifices it. This
ability costs {1} less to activate for each +1/+1
counter on Naora.