A Polymorphic Shellcode is a unique item players will need to access the Partition activity in Destiny 2. Unlike other currencies and items, this one is tied to a quest which isn’t available ...

In Destiny 2 Lightfall, Polymorphic Shellcode comes from completing the Weekly Bounty from Nimbus in Neomuna. However, players cannot simply approach Nimbus and start taking these bounties.

If you want pinnacle gear, then you’ll need to know how to complete the Destiny 2 Bluejay quest, as doing so lets you complete the Nimbus weekly bounties.