Roxana the Sun-Witch

Roxana the Sun-Witch. in the section on Partially Limited MageryGURPS Thaumatology p. 21. is an example of how the rules in the Basic set regarding limited magery been changed as well as clarifing how Magery 1+ prereqs work with limited magery.
"Roxana the Sun-Witch buys Magery 0 with no limitations, for 5 points, plus three more levels with the Day-Aspected limitation, -40%, for 18 points. Total cost is 23 points. She can detect and use magic items, and cast spells that don’t have Magery 1+ as a prerequisite, whenever she wants; when the sun is in the sky, though, she casts at +3." 
This expressly overrules the Basic Set which stated "Day-Aspected: You can use your powers only when the sun is in the sky (...) When the sun is down, you have none of your magical abilities, although a look at your aura reveals that you are a mage. (sic)Basic Set pg 67
Even under the Basic Set rules the Day-Aspected limit only applied to casting spells but the way the rules were written prereqs were meant for learning spells. The conclusion is that Roxana should be able to learn Magery 1+ spells during the day (but not at night). This would prevent for example, sleeping during the day and studying M1 spells at night.
==References==
Category:Rule Examples