Wrath of Leknif

A board wipe usually leaves the caster tapped out and defenseless, which is the whole social contract of the effect: you clear the table, then you sit behind an empty battlefield hoping to stabilize. The land-untapping rider rewrites that math. As the spell resolves, up to four lands come back up, so the caster stabilizes and still has mana in hand once the dust settles. That leftover mana is what changes the sequencing: hold up a counter for the first reload attempt, deploy a threat on the same turn the board is gone, or keep instant-speed interaction live into the opponents' turns. The sweeper stops functioning as a purely defensive tempo trade and starts working like a reset button that also pays for your next play. The blue splash is the tell. White has printed unconditional destroy-all-creatures effects for a long time, but folding a mana-recovery clause into the cast is a distinctly Azorius idea, the kind of thing that turns a wipe into a control engine. The no-regeneration line is the standard hedge against armies built to survive the mundane sweepers, so the destruction itself is airtight; the untap is the part that governs what you do with the turn afterward. This is a mass-removal spell written for the player who wants to act once the board is gone, not merely survive to the next draw step.