Hey Tenno! I hear your concerns about acquiring Hildryn - here's a bit more detail to clarify how that will look.
We've set up Hildryn in this event to be similar to Baro Ki'Teer in cadence. In the same way you can get Sands of Inaros from Baro Ki'Teer with Ducats when he visits regularly, you can use Thermia to get Hildryn. Fractures will occur often - like ghouls - to keep thermia in high supply. We’re also working on fracture improvements. Operation: Buried Debts will be frequent to make sure Hildryn's available to all!