Rosewater Says R&D Has Moved Away From Power-and-Toughness Swaps

On November 6, Mark Rosewater answered a question about power-and-toughness swaps by saying R&D has moved away from them because they work unintuitively with layers. He said designers now tend to use a fixed change such as +3/-3 to mimic a swap.

The Comprehensive Rules explain the catch: modifiers and counters apply before a switch, which then exchanges the creature’s already-modified stats. Timestamp order does not change that sequence because the effects apply in different sublayers. Aeromoeba uses the older wording: its controller can discard a card to switch its power and toughness until end of turn, as its card text shows. Spatial Contortion gives a creature +3/-3 until end of turn, matching Rosewater’s example; its text illustrates the fixed-change approach, though Rosewater did not name it.