The Guardian of the Spring is normally friendly but can be tamed if you use the toy "N'lyeth, Sliver of N'Zoth" while in War Mode. This version of the Guardian is the one that appears by Roan Berthold near Southwind Station (approx 67,52) for a short time after completing its associated vignette. The original version of the Guardian appears at The Placid Spring (approx 61,52) and can be mounted and ridden for 40 seconds. If you ride it to Roan Berthold at approx you'll be dismounted and receive a lootable chest.
The Guardian of the Spring is normally friendly but can be tamed if you use the toy "N'lyeth, Sliver of N'Zoth" while in War Mode. This version of the Guardian is a vignette NPC at approx 61,52 that can be ridden for 40 seconds. If you ride it to Roan Berthold at approx 67,52 you'll be dismounted and receive a lootable chest. A version of the Guardian with a different NPC ID will appear there for a short time.
Level scaling: In Shadowlands most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.