The New World Briars spawn in grassland biomes next to rivers. You can find New World briar buds for these so that you can craft new world weak mana potions for your job board quests. Getting Briars is important if you want to finish new world job board missions that need weak mana potions. If the server is new or the game just launched, other players won't be selling them for cheap. Now you know where to find Briar buds in New World.