黒門からの出撃 (March from the Black Gate) (ja)
Enchantment
(CMC 2)
When March from the Black Gate enters the battlefield and whenever an Army you control attacks, amass Orcs 1. (Put a +1/+1 counter on an Army you control. It's also an Orc. If you don't control an Army, create a 0/0 black Orc Army creature token first.)