There are in total 10 different dual-colour combinations in Magic, and while we wont go into all them, each pair represents a guild in the Ravnica storyline, and each possess unique traits and mechanics
Power Vice Dragon X DARK Level 5 [ DragonEffect ] ATK 2000 DEF 2400 A "Red Dragon Archfiend" that was Synchro Summoned using this card as material cannot be destroyed by battle
They're birds, demons, humans, eldrazi, fish, cowards, warriors, and more
The other breakout card from the deck has been Trouble in Pairs, which is sort of like whites Rhystic Study, letting you draw cards when your opponents do things
Then he has trample and then a death trigger for an opposing Commander to be Ring tempted
Its effect(s) is negated.