Hold the Gates

Whenever a creature you control dies, place a
charge counter on Hold the Gates.
At the beginning of your upkeep if there are 10
or more charge counters on Hold the Gates,
sacrifice it and gain a legendary emblem with: "Whenever an opponent attacks you, create X
2/2 Human soldiers. Where X is the number of creatures the attacking player assigned to attack
you. Exile these tokens at the beginning of the
next end step."