Shadowspec Bars are endgame bars used to craft various developer items. They are essentially a direct upgrade to Auric Tesla Bars crafted using Calamitous Essence. Each time Supreme Calamitas is defeated, she drops enough Calamitous Essence for 20-30 bars (30-40 in Expert mode and above).
Crafting all items requires a total of 253 Shadowspec Bars (253 Calamitous Essence; requires defeating Supreme Calamitas 12–15 / 9–13 times).
- This item was misattributed as being dedicated to "Shadowspec" for a long time, however this was erroneous and the developer's real username was simply "Shadow".