Warped Physique

The bend in this design is that it spends your hand twice. The +X/-X swing scales off cards held, which means the version that throws the biggest pump or the most lethal shrink is the version where you have drawn cards and committed nothing to the board, the exact posture that makes those cards worth dumping into a single instant. Read as removal, X is the size of the kill it can land, and X is largest when you are holding back: a control hand can erase a midrange threat at instant speed without ever tapping out. Read as a finisher, the same number sizes a pump, which is a clumsier ask, since a wide hand and a board worth pumping rarely coexist. The dimorphic minus-toughness mode is the real job, a removal spell whose ceiling is your own card economy rather than a fixed number, and whose floor falls out the moment you empty your hand to develop. That fragility (it is dead weight when topdecking and most potent when you can least afford to spend everything) is what keeps a one-card-kills-anything instant honest at two mana. It rewards a deck built to sit on cards, and punishes the curve-out it would otherwise dominate.