Ashbringer, Ship of Steel

Crew 10 (Tap any number of creatures you
control with total power 10 or more:
This Vehicle becomes an artifact creature
until end of turn.)
Whenever Ashbringer, Ship of Steel becomes
a creature, put a +1+1 creature on each
creature that was tapped to crew it. Then, Put
an equal amount of +1/+1 counters on Ashbringer,
Ship of Steel, multiplied by two. Remove all of
Ashbringer's counters at next end step.