Calzor

enchant your weapon dealing regular melee attack damage, add 3d6 thunder, 4d6 radiant, and 2d12 necrotic and heal for half the damage dealt. the blast then split into directions within 10ft radius from the target dealing 1d6 thunder, 2d4 radiant, and 1d8 necrotic damage.

at 5th level increase damage by 1d6 thunder 1d6 radiant, and 1d12 necrotic and add 1d6 thunder 1d4 radiant and 1d8 necrotic during the split, at the 11th level (2d6,2d6,2d12 and 2d6,2d4,2d8). at 15th level (3d6, 3d6, 3d12, and 3d6, 3d4, 3d8).  at the 18th level (4d6, 4d6, 4d12 and 4d6, 4d4, 4d8)