Tarvik, soul Farer

Ward pay {p/w}, flash
When Tarvik, soul Farer enters the battlefield
exile up to X target creatures where X is the
number of times Tarvik, soul Farer has been cast
from the command zone.
{p/b}{p/b}, pay 2 life: you may play a creature spell
from exile with mana value X or less without
paying it's mana cost