Imaginary Friend

When Imaginary Friend enters the battlefield or
when it attacks, if there isn't a creature exiled
by it with counters on it, exile target creature
with power 3 or less and put three +1/+1
counters on it.
At the beginning of your upkeep, move a +1/+1 counter the exiled creature onto Imaginary
Friend. If there are no counters on the
exiled creature, Imaginary Friend gains the
abilities of that creature.