Ichor-Step Monstrosity

Flying
Whenever one or more +1/+1 counters would be
put on Ichor-Step Monstrosity, you may pay {x}{x}{g} if you do, double the amount of counters
that many times.
—Whenever this creature attacks, you may create
an X/X copy of it tapped and attacking except it
is an Ooze in addition to it's types. Sacrifice it at
the end of turn. X is the number of counters on
this creature.