
When this Equipment enters, amassamassTo amass Goblins 1, put a +1/+1 counter on an Army you control. It's also a Goblin. If you don't control an Army, create a 0/0 black Goblin Army creature token first. Goblins 1, then attach this Equipment to the amassed Army. (To amass Goblins 1, put a +1/+1 counter on an Army you control. It's also a Goblin. If you don't control an Army, create a 0/0 black Goblin Army creature token first.)
Equipped creature gets +1/+0 and has menace.
EquipEquipPay the cost to attach this Equipment to a creature you control. Equip only as a sorcery.
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.