Macros
Macros allow you to create your own revisions to aid with spell scribing.
A map that links a set of patterns to a set of spells is used to define macros.These maps, when inscribed into any ring and worn in a ring slot, will be checked for keys matching any drawn patterns.
A simple Macro Ring can be used for this purpose if no other rings are available.
If a macro for a drawn pattern is found, the associated spell will be cast and given one argument:A copy of the circle it is drawn in.The spell is then expected to return a new spell fragment to replace the fragment given.
This effectively lets anyone create their own set of revisions.
Note: Macro spells are not capable of long casting.This means they do not take a spell slot, but also can't run more than about 64 circles.