You can use a Free Action on your turn to cause the enchanted item to glow with a golden Mage Light, which you can turn off with another Free Action on your turn.
You can use a Free Action when you deal damage with the weapon to deal Radiant damage instead of the weapon’s normal damage type.
When you deal Radiant damage with the weapon to an Undead or Ooze, you can spend 1 charge of Inspiration or Mana Flux to gain +1 Bonus Die to your damage roll.