Undercity Reaches

The plane format's whole conceit is that the board itself pushes on the game, and this one pushes toward aggression by paying combat off. Any creature that connects offers its controller a card, which turns the plane into a shared engine: every player at the table wants their attackers to land, and the incentive rewards going wide and going face rather than trading in the air. The subtlety is that the draw is a "may," so it never forces a deck-out on the beatdown player who is already flooding, and it applies to all controllers, not just the planar walker, so racing becomes a genuine card-advantage contest rather than a solo value pump. That first ability creates an obvious tension, though: once you are drawing a card every time you swing, hand-size becomes the ceiling. The second trigger is the release valve. Roll chaos and your maximum hand size disappears for the rest of the game, so the plane anticipates its own failure state and builds the fix into the same card. As Planechase pieces go, this is one of the cleaner marriages of theme and mechanic: Ravnica's undercity as a place where combat feeds you, and the payoff scales exactly with how committed the table is to fighting.