Sorcery
Destroy all creatures. Amass Soldiers X, where X is the number of creatures destroyed this way. (Put X +1/+1 counters on an Army you control. It's also a Soldier. If you don't control one, create a 0/0 black Soldier Army creature token first.)
“The five great satrapies feuded and withered. Shah Zareen's doubts were soon to be realized in blood.”
—The Tale of Kings