Jund

Plane — Alara   

Whenever a player casts a black, red, or green creature spell, it gains devour 5. (As the creature enters the battlefield, its controller may sacrifice any number of creatures. The creature enters the battlefield with five times that many +1/+1 counters on it.) Whenever you roll , put two 1/1 red Goblin creature tokens onto the battlefield.

041 PCA • ENAleksi Briclot

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Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

6/1/2012
Casting a multicolor spell will cause the first ability to trigger as long as that spell is black, red, or green. It can be other colors as well.
6/1/2012
If the creature spell already has devour, you may sacrifice creatures using either ability. Each creature you sacrifice counts for only one devour ability. Under most circumstances, you'll pick the devour ability that gives the greatest number of +1/+1 counters.