Picric, Clever Whelp

Flying
Picric enters the battlefield with a number of
+1/+1 counters equal to the number of historic
cards in your graveyard. Every time a historic
card enters your graveyard, put a +1/+1 counter
on Picric.
Hunted as part of a war they didn't understand, Picric resolved that while they would learn from the past,
they'd ensure its mistakes would stay buried.