Tiax's Ghast.

[Gnarl]

Why does Tiax have a Ghast?

Anyone ever hear of some back story for him?

Do priests of Cyric just get one or some other high level skeleton?

[SSerponi76]

AFAIK Tiax has the exclusive power of summoning ghasts: https://baldursgate.fandom.com/wiki/Tiax

[AlexMBrennan]

Same reason Minsc can rage - the developers thought that it would be a fun ability for the character to have