The Yasaki no Magatama is a jade jewel said to be used to lure the goddess Amaterasu out of hiding. It was passed down through centuries in the Japanese Imperial bloodline until it eventually was stolen by yokai. The jewel has infinite value and any merchant with common sense would trade their families for it. The jewel is also said to give those who hold it, the benevolence to help all in need. To use the jewel, it needs to be affixed to a piece of clothing or the hilt of a sword.

When affixed to a sword, the sword will do an additional 1d4 lightning damage.

This weapon has 5 charges and regains 1d4 + 1 charges daily at dawn. As an action, you can cast shocking grasp at will. As an action, you can expend one charge to cast lightning bolt. As an action, you can expend three charges to cast haste. As an action, you can expend 5 charges and cast steel wind strike. 

The DC for any spells cast from the jewel is equal to 10 + your Dexterity modifier.

Any allies within 10 feet of the jewel gain +2 AC. 

Benevolence: When a creature within 10 feet of you takes damage, you can use your reaction to magically take that damage, instead of that creature taking it

2 Charges / Advanced Thunderstep: By expending three charges, you can cast an advanced version of thunderstep. By crouching and unsheathing your katana, you can teleport to a space behind a creature in a thunderous boom. Each creature within 10 feet of the space you left must make a Constitution saving throw, taking 2d10 thunder damage on a failed save, or half as much damage on a successful one. The thunder can be heard from up to 300 feet away. You also get an attack of opportunity on the creature while you're passing by it.

 

 

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Damage: Lightning, Movement, Combat, Jewelry, Versatile, Sap