What's great about Arm for Battle is that it offers a simple strategy for building a strong creature army and taking over your opponents
Magic Online also offers leagues and tournaments if you want structured play
Decks that make use of Belle, Strange But Special rely on strong card draws to stop from burning out, and Sisu can provide multiple cards as long as you can keep her safe
Over the years, WotC has occasionally unbanned cards in various formats when they determine that the card is no longer problematic due to shifts in the metagame, power level adjustments, or changes in card pool dynamics
There are also three different depictions and cards for the Witch-king: Witch-king, Bringer of Ruin, Witch-king of Angmar, and Witch-king, Sky Scourge