Experiment One
d56a2703-06b8-4bdf-b346-dd38dbc06f2b
$2.49 CND
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Remove two +1/+1 counters from Experiment One: Regenerate Experiment One.