During Gate of Bones he learns to use a sword and is found to be a berserker .
Stefan -- Is a SkinWalker , who , when he gets upset or stressed he turns into a young Grizzly bear .
During Gate of Bones Stefan learns to use a sword and is found to be a berserker .
Stefan -- Is a SkinWalker , who , when he gets upset or stressed he turns into a young Grizzly bear .