The perfect lore tool for the Pale Ones,  like a bunch of cool quests to expand a PC's storyline. 
"The structure's hum intensifies, causing strange mutations in local wildlife. Birds explode in the sky." Nice!

I like how the d20 list almost reads like a progression of events surrounding the monolith, slowly escalating till reality collapses around it.

Cool concept to tie a few different pieces of lore together, but my very favorite part is #20 - a portal to other dark forts. Feels like a fun way to whiplash a party into another borg-hack.