If you have a deck manipulation deck that puts permanents from the top of the library into play, getting this down is a good play if you need a removal spell
If you want to use a land to destroy opposing lands, you have Dust Bowl, Encroaching Wastes, Ghost Quarter, Memorial to War, Strip Mine, Tectonic Edge, or Wasteland
You can create pretty consistent scenarios where you play a room card and unlock the other door: Victor, Valgavoth's Seneschal lets you surveil 2 while your opponents discard a card
The more restrictions I have to my problem, the more I can figure out which areas I need to explore
Delirium isnt super difficult to get online, and if youve stocked your graveyard well youll have a target for what's one of the best delirium cards