Thunderblade Vajra

Sword used by a boy raised by the thunder beast. It's made of Kirin horn.

Upgrades

Can also be made new at the smithy.

Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 700.

Materials

Lightning Sac ×4, SpecRubberyHide+ ×6, Kirin Azure Horn ×3, Kirin Hide+ ×3