Amphis

"Fashioned with Grineer materials, and balanced for marine infantry use, the AMPHIS heavy staff is a traditional weapon that has recieved a monstrous makeover that enables shock damage on jump attacks."

- In-game description.

Characteristics
Advantages

 Ignores armor. Has an AOE electric jump-attack. Can hit multiple enemies at once.  Disadvantages

 Sub-par damage compared to other heavy weapons. 

Acquisition
Amphis can be purchased for 150  (Platinum). It's blueprint can be purchased for  15,000 (Credits).

Manufacturing Requirements