From Sphinx's Insight it seems Isperia realized Bolas's plot through Dovin which might have lead to her death. Seems like Dovin was able to become Grand Arbiter and might be how is able to become guild master after Isperia gets stoned.
Indeed. It fills the gaps nicely.
Dovin somehow becomes the Grand Arbiter of the Azorius.
Isperia uncovers Dovin's intentions and plans (and the master), and unfortunately lets Dovin know it.
Isperia calls the Guild Summit.
Dovin notices Bolas about Isperia's revelation.
Bolas orders Isperia turned to garden decoration by Vraska.
Dovin takes over as second-in-command and activates Emergency Powers.
The sphinx on Sphinx's Insight looks more like a random Azorius sphinx to me. Headgear is similar to Isperia's, but the suit of armour doesn't match her canon depiction, as reinstated on Guild Summit. No elaborate collar, no forearm pieces.
The sphinx on Sphinx's Insight looks more like a random Azorius sphinx to me. Headgear is similar to Isperia's, but the suit of armour doesn't match her canon depiction, as reinstated on Guild Summit. No elaborate collar, no forearm pieces.