Asura’s Potion (Razor)

Asura’s Potion, Lv. 10

For 5 minutes, gain two additional arms that work identically to your normal limbs.

The arms can swing additional weapons and will be automatically equipped with the weapons from the next item set.

Also increases rage gain by 200% for 25 minutes.

Reference
Acquired in Chapter 121 "Deck The Halls"