Majestic Genesis

The variable X here is not counting anything on the board or a permanent's power: it reads your commander's mana value straight off the card, which makes this a green mass-cheat effect that scales with a deckbuilding decision you locked in before the game started. Play a two-drop general and X is a nudge; play an eight-mana Eldrazi or a lumbering high-cost legend and this reveals eight cards deep and dumps every land, artifact, creature, and enchantment it finds onto the battlefield at once. The permanent-cards clause is where the effect stays honest: instants and sorceries in the revealed pile go to the bottom in random order, so the payoff rewards a deck built on bodies and mana rocks rather than a spellslinger shell. It sits in the tradition of top-of-library reveal-and-cheat effects, but instead of a fixed number, this one hands you the dial and asks you to size it in the command zone. The tension is real: the biggest, splashiest commander is also the one that turns eight mana into a board state that can end the game, and the card quietly incentivizes the exact kind of expensive, marquee general that eight mana wants to cast anyway. It rewards top-heaviness twice over, once for the reveal count and once for the fatties you hope to hit.