Manufactured Horde

Whenever a creature is cast, put an expansion
counter on Manufactured Horde.
At each end step remove all counters from Manufactured Horde.
At any point if Manufactured Horde has 10
expansion counters on it destroy Manufactured
Horde, the last player to cast a creature gets an
emblem with: creatures you control have indestructible.
Without enough soldiers, drastic measures are taken.