A card code is a series of letters and numbers (specifically two letters followed by two numbers) that is used as a distinction for R&D, and other internal sections of the company, to identify a particular card
Nethroi, Apex of Death Nethroi, Apex of Death has a pretty good ability to reanimate creatures, and it can be relatively cheap depending on the mutate creatures you put in the 99
A team loses if their life total reaches 0, or if one player would lose through other means (mill, alternate lose-cons, etc.)
Don't get left in the dark
The main reason it was banned wasnt because its overtly oppressive, but because its so good as the commander of just about any strategy that it actually stifles creativity and diversity, and diluted new deck ideas, and fielded out more synergistic commanders in their own decks