Arachne Crystal

Arachne Crystals are used to summon the Stronger version of Arachne.

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

Arachne has 20M hp after being summoned with crystals.