Divine Holy Weapon

You can imbue one two-handed weapon, you touch with holy power.  In darkness, the weapon sheds sunlight and emits a holy light in a 10-foot radius and dim light for an additional 5 feet. In addition, weapon attacks made with it deal an extra 1d4 radiant damage on a hit. The damage is replaced by 1d6 when you reach 5th level  7th level (1d8) 10th level (2d6), 14 (3d8) and 17th level (4d8). When you call the name of your holy weapon it will fly towards your hand at 60 feet a second. The bonding ritual takes 10 minutes and you'll lose your last weapon bond if you start a new ritual. The weapon can damage creatures that are immune to normal weapons.