Arachne Crystal

The Arachne Crystal is an item used to summon the stronger version of Arachne.

Obtaining
The player can obtain a crystal by talking to Shaggy after finding all Uber Relic while having 3 Arachne Fragments, 8 Enchanted Spider Eyes and 30 Enchanted String in the inventory. This gets you 1 Arachne Crystal.

Arachne has after being summoned with the crystals.