So, there has been a moderate amount of speculation, verging on certainty, that spren can be corrupted... and quite a few people are saying that maybe Sja-Anat has that ability.
I looked this up on theoryland briefly, but I was hoping maybe somebody knows a WoB that can either confirm or refute that investiture can be 'corrupted' in the sense of 'metamorphosized' or 'changed in nature'.
I have this WoB: