Bead of Darkness

This is all because those in the material world acted so rashly and opened the entrance. It's none of our business. But because your plea is so desperate, we'll help you this time. To send the Monsters of Darkness back below, you'll need a Bead of Darkness. Suddener has it to the north of Glass Lake. To begin your quest, defeat the Griffin Suddener, get the Bead and take it to Adventurer Indee south of Ellore.

Defeat Suddener, get the Bead of Darkness and take it to Adventurer Indee south of Ellore. She'll take care of the rest.

So the part I couldn't read on the Stone Tablet was about the Bead of Darkness. Thank you. Hey, you look hurt. Get some rest and drink some Life Potion.