Did not like the looting of his family grave.

Son is named Oswaldo

devil worshipper.

Cassalanter invested a great deal of resources into getting into the Vault so he could pay Asmodeus in some way. Due to the Divine Shanks this proved futile and he seemingly lost his children.
Since then he has plotted just what to do with his fortune and invested in Plan Albion to further his own goals, including getting revenge upon the Divine shanks.
He and his wife Ammalia Cassalanter has moved to the Undermountain and is currently the benefactor of The New Seven while also working as the headmaster of Dweomercore

Held Slime Slayer Sigurd “Sliggy” Sigurdsson captive after getting him from Trissa auvryndar in a ransom. Kept him in a cage dangling over his living room for a week while casting charms upon him time and time again to learn every secret he held aswell as battle plans and tactics of the Divine shanks.

Was utterly embarrased by Asterius in a duel at the Xanathars guild

Capable of casting:
Charms
Fear spell (DC over 20)
a tantrum