Arachnology 101 is an active item in Arachna, a mod for The Binding of Isaac.

Grants one of the following rewards:
• A spider fact.
• A Web Heart.
• Several blue spiders.

This item contributes towards the Spider Baby transformation. Collecting 3 items from this set will spawn a spider familiar that applies random status effects when it comes in contact with enemies.

This item contributes towards the Bookworm transformation. Collecting 3 items from this set will make Isaac fire an extra tear 25% of the time.

Arachnology 101 can be found in the following item pools:

The following tags are applied to this item:

• Check out the item description on the mod's external Wiki.
• Download Arachna from the Steam Workshop.