Add Feruchemy activation chain (mistborn_feruchemy.0001/0010) for Terris characters discovering their art and creating first metalminds. Add Allomantic training events (mistborn_training.0001/0010/0020/0030) for mentoring family members. Add metal supply events (mistborn_metal.0001/0010/0020/0030) for reserve management and wartime scarcity. Add sandbox testing event (mistborn_sandbox.0001) for voluntary metallic arts discovery. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>