Old Faith And Promise

{1}{c} Select a creature you can control flip a coin at a 80/20 chance, heads being 80% and tails being 20% heads giving the creature a
+1/0 and on tails it gives -1/0.
For each consecutive use of this ability the
odds shift 20% at a time towards tails stopping at 20% for heads and 80% for tails
resets after a enhanced creature dies.