This mount is earned by killing Shizgher in the Mistveil Tangle, then clicking on the Shimmermist Runner they were tormenting. However, because things aren't always as they appear in the Mistveil Tangle, trying to approach normally will result in Shizgher and the Runner disappearing. You must take a specific path through the tangle in order to reach them.
From there, continue following the arches with blue lanterns. Avoid any arches with red lanterns or no lanterns. Eventually you should reach Shizgher and the Shimmermist Runner and be able to approach them. Dying does not reset your progress.
Mischievous spriggan and the valerunners have a natural enmity. No valerunner would deign to allow a spriggan rider because they can sense their inherent malevolence. This angers the trickster Spriggan who take twisted enjoyment in playing cruel pranks on these majestic creatures.
- Patch 9.0.2 (2020-11-17): Added.