That is an easy-to-follow tutorial on the Horror From the Deep quest on Outdated College RuneScape. This quest is required for entry to the Dagannoth Lair and for getting God Books. Thanks for watching!
Required (mini)Quest: Alfred Grimhand’s Barcrawl https://youtu.be/2HQklF_93kk
35 Agility (boostable)
Capable of defeat a degree 100 enemy
35 Magic (really useful)
40 Prayer (really useful)