Mormus, Unstable Crypt

When Mormus, Unstable Crypt enters the battlefield, You may exile any number of
creatures in your graveyard.
Mormus enters the battlefield with a number of
+1/+1 counters equal to the total power of all creatures exiled by it.
Mormus has all the abilities and keywords of all creatures exiled by it.
Mormus has all creature types of all creatures
exiled by it.