William the Conqueror

+2: Give one creature +1/+1 until the end of turn. If a card with the name Willow is under your control, then give +1/+1 to all of your creatures.
-3: Give a creature first strike and lifelink. If you control a card with Willow in the name give first strike and lifelink to all of your creatures.
-5: This card becomes a 5/5 Human Mage with indestructible. If you control a card named Willow, William becomes this automatically.