Skyskin Hornstrider is a new mount added in Patch 10.0.5 that can be purchased with a new currency from Primalist Tomorrow and the Primal Storms currency.

Skyskin Hornstrider costs 150 Essence of the Storm and 3,000 Elemental Overflow (Primal Storms currency)

Essence of the Storm is a new currency from Primalist Tomorrow that is used to procure items from Brendormi.

Skyskin Hornstrider

The instability of primalist storms in potential timelines sometimes causes creatures to absorb the energies from the very storms. These creatures tend to be docile towards those who are able to face the fury of these chronomatic anomalies.