face down card mtg Fear What Lies Beneath a Face-Down Still learning can someone explain

Cards that ramp are varied and numerous, including: Cards that put extra lands into play, like Rampant Growth Cards that tap for mana, like Sol Ring or Birds of Paradise Cards that reduce costs, like Goblin Electromancer Cards that produce short-term bursts of mana, like Dark Ritual or Dockside Extortionist Ramp is an essential element of Commander deckbuilding

1 Silent-Blade Oni

Any of our effects which discard one or more cards end up drawing us more cards

Similar to how the TMNT Commander deck is structured, all four heroes can be used as the face Commander, but due to there being no sign of the partner ability, you won't be able to run with more than one at a time