Doo A-Spor

Whenever Doo A-Spor enters the battlefield, you may flip a coin. If you win, you may flip another coin until you lose a coin flip.
Whenever you win a coin flip, put a chance counter on Doo A-Spor.
If Doo A-Spor gets five or more chance counters on it you may have Doo A-Spor become a copy of target creature and gain this ability.