Guardian of what exactly? | Dark Souls 1 Lets Play Part 19

With his way to Gwyn now open, Bonk thinks his adventures in Lordran are over, that's until he learns of a town called Oolacile and goes about trying to get there, he soon discovers a portal which he is dragged into by a mysterious hand. Stuck in the past Bonk must now navigate this new strange land in search of the source of the Abyss to stop it spreading further in this time and his present day