Brother Anton is a level 45 quest giver located at Nijel's Point in the contested territory of Desolace. Brother Crowley in Stormwind City instructs Alliance members to seek out Brother Anton. He is an emissary of the Scarlet Crusade challenging adventurers of the Alliance to destroy several undead residing in the Valley of Bones in southeastern Desolace. If this is accomplished, they are then sent to Raleigh the Devout to be "embraced" by the Scarlet Crusade.
Brother Anton, despite nominally belonging to the Scarlet Crusade, is, much like Brother Crowley and Raleigh the Devout, of the Stormwind faction and has diplomatic immunity. He seems unaware of the evil directions the Crusade has taken as of late.
He starts the following quests:
[39] Down the Scarlet Path- [40] Down the Scarlet Path
Cataclysm
After Cataclysm he can be found in Valley of Bones in Desolace, killed.
References
Brother Anton may be named after real-world occultist and founder of the Church of Satan Anton LaVey.
