Elminster, Yennett, Cryptic Sovereign, Intet, the Dreamer, and Aminatou, the Fateshifter are just a handful of commanders that benefit from knowing whats sitting on top of your library
Deck boxes come in many sizes, so it's important that you're getting one that's capable of holding your deck
Blue The trick here is to do a filter effect (that is an effect that involves drawing and discarding cards) that can target any player
Static abilities that affect the Soldier's power and toughness may change this, but Ancestral Blade will be attached to the Soldier before the game checks to see if it has toughness 0 or less
Cards like Arthur, Wizard's Apprentice and Madam Mim, Fox are perfect for returning cards to your hand, and they're also of the Amethyst ink type