Blackwood's statement

Find Blackwood in the temple of Dagon in The Sinking City 2 and learn about a prophecy concerning a great evil beneath the city.

You find Blackwood in the temple of Dagon, where he has also come to free Harriet Dough. Blackwood shares a prophecy: a great evil lies buried beneath the city, and a Chosen few, guided by visions, have the power to either save the world or doom it. While this information is confusing, Blackwood mentions that the frescoes within the temple hold further details.