Chris, Mystic Mycologist

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.)

When Chris enters the battlefield from the
command zone take an extra turn after
this one.
{t}: put a number of +1/+1 counters on target
creature equal to Chris’s power.