Mod Deg trading sequence is an easter egg that involves trading and transforming items obtained from updates developed by Mod Deg with NPCs (and other items) from those same updates.

Step Item Action

5 Apollo's helmet Interact with the previous item while standing near Wizard Chambers at Tuska's corpse (not the one at Lumbridge docks).

6 Magic flute Trade the previous item with a player-specific Goebie on Mazcab.