Quantum Reduction

Stripping five power and every ability from a creature is a familiar way to neutralize a threat without killing it: useful against indestructible bodies, recursive attackers, and commanders whose danger lives in their text box rather than their combat math. What changes the calculus is the teamwork clause. Tap creatures with total power 2 or more as an extra cost, and the Aura gains flash. That flip is the design's whole point. A sorcery-speed pacification is a proactive answer you have to declare during your own main phase and hope survives to matter; an instant-speed one is a combat trick in reverse, held up until a creature swings or an ability is about to trigger, then dropped to blank it in the window that hurts most. The teamwork tap is the toll: it converts board presence into timing flexibility, spending an untap step you might otherwise have used to attack or block. It rewards a wide board and punishes a tapped-out one, which suits a table where you tend to have spare bodies standing around anyway. The -5/-0 (rather than a symmetric shrink or a straight destroy) is a deliberate choice too: it leaves the creature on the battlefield, still countable for effects that care about creatures, still a body its controller must maneuver around, but declawed of the power and abilities that made it worth casting.