I ask of thee, a question oh wise
Eleminster. Are their magics more
greater then 9th and10th level? If so,
what are they oh wise sage? If not can one
research such powerful magics if properly done
right? If there are, mortals can't cast them and survive. The folly of Karsus shows us that…and his insanity, before his "end," may well have been due to trying to craft magics beyond mortal reach. So, no, one cannot successfully research magics of such power. El saith simply: "No."
— Ed Greenwood (@TheEdVerse) February 20, 2019