Split Up

A board wipe that reads the battlefield instead of flattening it. Where a symmetrical sweeper like Wrath of God asks nothing of the board state, this one splits along the line combat and mana usage naturally draw: you choose, on cast, whether tapped or untapped creatures die. Both modes resolve on your own turn, since this is a sorcery, so the angling happens in how each side committed creatures on the turns before. If your opponent alpha-struck into you last turn, their attackers are still tapped when your turn comes around, and the tapped mode sweeps them while your untapped board survives. If instead you are the one attacking, the untapped mode clears their held-back blockers while your tappers stay on the table. Because the mode locks in on cast, a responding player cannot shift the split in reply; the tension lives earlier, in who chose to tap out and who held back. That is the whole design: it converts a flat "destroy everything" into a sweeper you can angle to keep your own board mostly intact, provided you have already dictated the tempo that determines which half is exposed. It rewards a player who has won the sequencing battle and punishes one who committed creatures carelessly, which makes it less a reset button than a payoff for having set the board up on your terms first.