I took the "because I allowed it to feed on the true Weave" to refer to Elminster stabilising the orb. While before the orb first absorbed Gale's powers (which is when Mystra separated the link between them) and afterwards Gale and Tara discovered that he could give the orb items to absorb instead of draining himself, stabilising it allowed it to feed on the Weave/Mystra itself/herself - the thing she originally wanted to prevent. Probably the tadpole rendered it instabile - given the nature of the thing.
Last edited by Anska; 01/11/25 08:00 PM.