Double Strike Rafiqs double strike ability means that we can really leverage other combat damage triggers like Bident of Thassa and the various Equipment like Sword of Hearth and Home
In D&D, metallic dragons (bronze, copper, brass) are in opposition to chromatic dragons (red, blue, green, etc.), chromatic being the typical evil, sometimes cruel and selfish dragons while the metallic dragons are mostly altruistic and righteous creatures
There's also the deck building that is a key component as well
This led to worsening sales for the Duel Decks
Omnath combines your lands with a nasty 5/5 creature drop, letting you start the smash train early
If you don't hold any friends for Ghalta, then Griselbrand or Atraxa, Grand Unifier lets you sculpt your hand while adding an enormous flying lifelinker to the battlefield