If this card in your possession is sent to your Graveyard by your opponent's card (by battle or card effect): You can target up to 3 "Cubic" monsters in your Graveyard
Contents: 1 Tarkir: Dragonstorm Seeded Booster 14 clan-aligned cards including 1 Traditional Foil Rare or Mythic Rare 5 Tarkir: Dragonstorm Play Boosters Each Play Booster may contain these cards: TDM 1286, 292398
So in a Commander context, I see discard as the best way to describe a swathe of interdependent synergistic mechanics, mostly based in black, which look for advantage by quickly pitching their own hand to the graveyard
But there are a lot of aggressive Boros creatures you can use, like Jaxis, the Troublemaker, a smattering of planeswalkers, and lots of pump spells like Antagonize and Infuriate
While it is niche - there needs to be a reason to have this in a Tron or Eldrazi sideboard, for instance - when it's powerful, it's really powerful