Endless Ranks of... MoA OrcsZ!

At the beginning of your upkeep, put X 2/2
green Orc creature tokens onto the battlefield,
where X is half the number of Orcs you control, rounded up.
Loot token you control have "{2},{t}, Sacrifice this artifact: Create a 2/2 green Orc creature token. Activate this ability only as a sorcery."