Nyarlathotep, Reptant Chaos

Convoke.
Whenever it enters the battlefield and in your
upkeeps put a copy counter on a target creature.
Nyarlathotep, Reptant Chaos are a copy of a
creature with a copy counter on it.
{2}{p/c}: Until end of turn Nyarlathotep, Reptant
Chaos are a combination of creatures with copy counters on it.