Bearer of the Heavens

Most board wipes are spells the caster aims; this one is a Giant whose death is the detonator, and the trigger is delayed until the beginning of the next end step. That gap is the entire design. The destruction does not resolve when the 10/10 dies: it waits, which hands the controller a window of priority between the trigger going on the stack and the end step actually arriving. Anything already on the battlefield when that trigger resolves is destroyed, including a creature flashed in too early. To walk out of the rubble, you have to wait until the trigger has fully resolved and the cataclysm has swept the board, then rebuild on a clean table. The body itself is the trap. Eight mana for a 10/10 demands an answer the moment it lands, and the most natural answer, killing it, is exactly what arms the bomb. Opponents are punished for removing it and only rewarded for ignoring a creature that ends games on its own. Indestructible permanents survive the sweep, which is the seam patient builds learn to exploit: stack the board with what the destruction cannot touch, then push the Giant into the graveyard on your own terms. Few cards turn their own removal into a deliberate reset, and fewer still let the player who built around it decide when the countdown starts.