It partners with the godly gun Borealis, making the Australis Set

This and its partner gun are two of the twelve gamepass weapons where you had the option to buy them as part of a bundle or separately, the others being Soul, Spirit, Pearl, Pearlshine, Flowerwood, Flowerwood gun, Darkshot, Darksword, Waves, Ocean, Rainbow, Rainbow Gun, Sakura, Blossom, Phantom, Spectre, Plasmablade, Plasmabeam, Iceflake, and Icebeam.