Shaggy

Shaggy is an NPC located at the Spiders Den, inside the house on the hill.

He will give you the next part of the Relics quest if you have 1) spoken to the Archaeologist 2) battled Arachne and 3) are holding an Arachne Fragment. This quest says that you need to find 7 "rare relics," out of the 28 Relics found on the Archaeologist quest. They are marked with purple particles, similar to the Glowing Blocks found in The End. To activate the quest, you simply need to speak to Shaggy while holding an Arachne Fragment and have battled Arachne.

Dialogue

 * I used to think this world was peaceful, but there are some beings in this world that are stronger than I could ever hope to handle...

While holding an Arachne Fragment

 * Wow, you actually challenged that old witch Arachne, you have some potential kid... Have you heard about the rare relics on this island? Legend says they are infused with an evil deities strength, the truth is it is her power. If you help me find those Relics I will tell you everything I know about the creature.

After the above, and before finding all the "rare relics"

 * I hope we find those Relics one day...