The transmutation fired no flourish: its event carried no coordinates
for the wall case and the mapper knew neither it nor the wave it
raises. The event now carries its edge; the burst splashes both sides
of the vanished wall (or the freed square, for a block), and every
wizard the collapsing wave carries leaves a wash streak — which also
gives the plain WATERWALL's wave its motion for free.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>