Wakanga O'tamu

Wakanga O'tamu, amale Chultan human mage, is the only arcane spellcaster among the merchant princes. He's a long-time friend of Syndra Silvane, and he's something of a dandy who's easily seduced by smart women—or perhaps that's only a carefully constructed public image. Unknown to his peers, Wakanga is sympathetic to the Harpers and allows them to use his villa as a safe house.
Wakanga deals in knowledge, information, lost lore, potions, and scrolls. He knows of the death curse but little else about it. If the characters seem committed to ending the curse, he'll help them as best he can, including selling them minor magic items. Wakanga has a monopoly on these items in Port Nyanzaru, so characters either pay his prices or go without. As much as he wants to help, he's unlikely to extend credit; all purchases must be in coin, gemstones, or jewelry.