Piper of Azathoth

When you cast this spell copy it X times. When
you cast this spell, create a 10/10 Leagendary Creature Token named Azathoth, the Daemon Sultan, with Slumber 7, Trample, Insanity 4
and when you remove the Last slumber
counter on this creature, exhile all other creatures.
{t} Remove a slumber counter from a creature
you control.