Sais of the Caduceus

Flash
When Sais of the Caduceus enters the battlefield,
you gain 3 life and draw a card.
{w}, discard a card: Prevent the next 3 damage that
would be done to you or target creature.
{u}, pay 3 life: Draw three cards, then put two
cardsfrom your hand on top of your
library in any order.