Treasure

, Sacrifice this artifact: Add one mana of any color.

Feed the Swarm

Destroy target creature or enchantment an opponent controls. You lose life equal to that permanent’s mana value.

Swarming of Moria

Create a Treasure token. (It’s an artifact with “, Sacrifice this artifact: Add one mana of any color.”)
Amass Orcs 2. (Put two +1/+1 counters 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.)

Ruthless Predation

Target creature you control gets +1/+2 until end of turn. It fights target creature you don’t control. (Each deals damage equal to its power to the other.)