The most important and popular formats are Commander (100 card decks, mostly casual multiplayer), Standard (60 card decks, cards more than three years old are illegal), Modern (60 card decks, cards printed before 2003 are illegal) and Draft (40 card decks, built by opening brand-new booster packs and choosing cards from what you find)
Happy hunting and who knows
One of the interesting design challenges with eternalize involved figuring out how to capitalize on the fact that the token copy was a 4/4
O-Kagachi, Vengeful Kami Five-color spirits needs O-Kagachi, Vengeful Kami as a commander, but Im not sure its enough value as a commander to explore into 5-color
Cards like the Mystical Archive s Faithless Looting or Stasis are usually brought up when bad art is mentioned, but I personally think theyre amazing