Craft it
You need
×50Ancient Civilization Parts×200Paldium Fragment×50Hexolite×5Thermal Core×30Ancient Civilization Core
Make it at (any of these)
Needs a Pal with Handiwork. Best:Solenne (Lv 8), Selyne (Lv 7), Wistella (Lv 6)
Work: 2,000,000 · Unlock in the Technology menu at level 60 for 5 Technology points