Boosting spells with extra ST

[Shostak]

Originally Posted by hcobb

4-Hex Illusion takes 14 pages in a spellbook, but this includes the ability to cast 1-Hex Illusion which only takes 11 pages.

What's in those extra three pages if the difference is purely in the mind of the sorcerer?

Illustrations of larger figures on a hex grid with indications of front, side, and rear hexes.