Ajani, Lifelong Mentor

Haste, vigaliance, protecton from Planeswalker abilities
When Ajani, Lifelong Mentor enteres the battlefield, proliferate
then proliferate again. If you control an ajani planeswalker, you win the game
Ajani, Lifelong Mentor cost {x} less to cast, were {x} is the number of
Ajani planeswalkers in you deck or on the battlefield