Lets look at a decklist, shall we
Cards like Archfiend of Ifnir and Drake Haven capitalize on the discard, while Nadir Kraken capitalizes on the draw
Each Brothers War Commander Deck set includes 1 ready-to-play deck of 100 Magic cards (2 traditional foil legendary cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack, 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card
Simply look for the symbol to determine what the Energy type is (e.g., blue water droplet for Water, yellow lightning bolt for Lightning)
Its a free sacrifice outlet, and it also gives you something else to do with Blood tokens