Birdcaller

Whenever you cast a white or blue spell, you may
pay {2}. If you do, put a 1/1 Flying white Bird
token.
The third time a bird token is created with the
ability of Birdcaller on your turn, you may lose 5
life. If you do create a 0/5 Bird Hunter token
with Deathtouch and Reach onto the battlefield
under your control and destroy all bird creatures.