Thanks to Wizard's Eye, Will had little trouble extracting the Runes. He had already mastered Skele-Gro's basic structure. What troubled him now was how to stack those structures quickly. Simply pouring in more Magic would not work; if he failed to control the flow, the Runes forming the basic structure might warp.
"Stacking... stacking..."
Will took the book out of the Restricted Section and returned to the Room of Requirement.
He needed to study exactly how those spells were stacked.
Will reopened the heavy Spells: Origins and Deconstruction, urgently searching for a more detailed explanation of "stacking."
The book lived up to its title. It was packed with theory on origins and structure.
"'Stacking' is not simple repetition," the book explained with scholarly precision. "It is closer to 'rewriting' Magic or 'amplifying resonance.'
"Take Flesh-Rotting Bone-Erosion. Its core magical structure is a compound Rune representing 'decay' and 'dissolution.'
"Yet a single instance of that structure has an extremely limited effect, scarcely more than an insect bite."
"In the year 462, the modern Charms Master Jomaston discovered that, through precise guidance of Magic, a caster could do more than construct the structure once. By continuously 'rewriting' it hundreds or even thousands of times at an extremely high frequency, the caster could reach a point where those identical structures produced a remarkable resonance.
"They do not repel one another. Instead, they behave like layers of natural crystal, each contributing its strength until the 'corrosive' effect is amplified layer by layer into a destructive force of considerable power."
"But one technique is crucial," Will read on, his attention sharpening. "Every 'rewrite' must be as precise as possible. There can be no deviation in the strength of the Magic output or the structure's size and shape.
"Any failed or distorted rewrite is like an