|This article contains canon information corresponding to the Tales of Arcadia franchise. That means all information in this article is true and has appeared/been validated officially on-screen.|
The Staff of Avalon is Merlin's most powerful relic, which he built to channel the arcane energies of the universe itself.
Since the staff was the only relic powerful enough to free Morgana from her prison, Gunmar and Angor Rot followed Jim and his friends to Merlin's Tomb where, after a confrontation, they obtained the Staff of Avalon before the Trollhunters, who found and awoke Merlin himself instead.
Gunmar later attempts to use the staff to free Morgana from her crystal prison underneath the Heartstone, until its magic backfires on him. He failed to realize that the staff can only be brandished by human hands who can speak in a trollish tongue. Gunmar then orders Queen Usurna to find and capture a Changeling alive. First, they try to capture Nomura against her will, but when she manages to escape, the Gumm-Gumms decide to capture Strickler instead and use Barbara Lake as a hostage to force him to free Morgana with the staff.
Luckily, when she is banished to the Shadow Realm, Merlin was able to restore his staff's magic, as well as his own.
The Staff can be used to channel the universe's energy itself, making it possibly the most powerful magic tool in existence. However, Merlin designed it so that it could only be brandished by human hands (as such, if a troll attempts to use the staff, the spell will backfire on them).
It can also be used by either a Changeling or a human who knows magic.
- It could implied that Merlin built the staff within Avalon, a legendary island in Arthurian legends where Excalibur was forged and is the home of Morgana and other magical beings.