Utter Island Albinos: upgraded as a 5e Sorcererous Origin?
by Marc SaindonProbably an under-used group in Ierendi, the Utter Island Albinos (better name needed) could have their strange connection to sand and weird architecture be tied to "psionic powers" they develop as a bloodline, with Sorcery providing the game mechanics of these psionic powers along the lines of the Aberrant Mind subtype.
http://dnd5e.wikidot.com/sorcerer:aberrant-mind
Additionally, lore-wise, they could be made as distant descendants of the Taymorans who survived the cataclysm (perhaps a crew sailed to distant shores to trade and explore, only to find their homeland vanished upon their return). They could have from this a unique language unrelated to nearby cultures (e.g. Taymoran as Etruscan) and the Albinos have their own an endonym that evolves from the original name (e.g. the "Tamaroans").
(Image from: https://www.deviantart.com/strangenchanted/art/Girl-in-the-Greenhouse-IV-1009516625)