Stronger scales, faster wings, blindsight, frightful presence? Maybe a breath weapon but I'm not sure how much he'd use it since he can already hit 2 targets with acid splash for 2d6+5 and I fluff that as his breath weapon. Maybe a once per day acid lightning bolt. 60' line, 8d6. He'd want to be larger size, but that's not something I want. I like that he's 2' tall. Or maybe something goes hideously wrong.
Spoiler: Notes
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Duvi (Duvamil Sparklegem) gnome, Majordomo for Prince Oargev.
Haydith ir'Wynarn, Princess of Karnnath
Kellar d'Kundarak
Mialee, a Valenar elf who is training Oargev's troops
job in Kalazart (have map)
rescue salvage crew
Bring back documents
Kundarak loot can be sold to Kundarak
In New Cyre - Cyran Metalworks for armor and weapons
Dalsin's Wondrous Emporium - some magic items
Finas Tiyas, halfling ghost, now in Honor, needs to return sword to Eston.
Delver, warforged in camp
Stutterer, allowed to live
Escemizt, demon that sculpts people into horrors.