Avie Herdán, the Lightseeker

{3}{u}{g}, {t}: Create a copy of target non-legendary
creature you control but its power and thoughness is equal
to Avie Herdán, the Lightseeker.

Whenever a creature you control enters the battlefield or is created, put a +1/+1 counter on Avie Herdán, the Lightseeker.

When an opponent cast their first spell each turn, remove
X counters from Avie Herdán, the Lightseeker, where X
is that spells mana value.