Niffis Fighting Pits (Portal Gem)
From Drunkapedia
The portal gem drops randomly on Banderling Predators, Banderling Scalpers and Banderling Aggressors. A gem can also be purchased from the Colosseum Coin Collector.
The portal gem drops randomly on Banderling Predators, Banderling Scalpers and Banderling Aggressors. A gem can also be purchased from the Colosseum Coin Collector.