Parallel Acropolis

Crew 1
{t}{1} Put a charge counter on Parallel Acropolis
{w}{w}{b}{b}{3} Creatures opponents control get
+1/+1 and crew. They cannot uncrew. If Parallel Acropolis had at least 5 charge counters on it,
remove them and choose half of crewed creatures
rounded up. Destroy those creatures, then destroy Parallel Acropolis.