Nepenthes xiphioides (Toba Region, Sumatra)
Considered to be a form of N. gymnamphora by some, we believe that it is a good (and very nice!) species. Beautiful plants are available!
A typical highland plant. Not difficult as long as the right climate is provided. Cool nights should be provided to grow this plant.
As a substrate I’d suggest a more open mix. Good components for such mixes are Sphagnum-moss, horticultural perlite, pine bark plus a bit of peat moss. Drainage is recommended.