Most people don't play the conspiracies because the best ones are utterly broken and might be picked even over Sol Ring and Black Lotus. The uncards can be jarring but from a power level perspective typically aren't as problematic as the top conspiracies
It depends on how deep you go. Nerf War is a one card Storm deck. Contract from Below obviously. Necro-Impotence draws you 32 cards (ie your deck after your starting hand) for 16 life. And there are a number of others that are unbalanced without being virtual insta-wins.
Clocknapper is an almost-black border card and is S I C K
Not to get too off-topic, but my 360powered cube linked above does run Clocknapper, City of Brass and Caller of the Untamed as slightly off-kilter inclusions, but I do like to think that it's roughly representative of an ideal 360-powered cube.
Just a watchlist card for now, which means I'll see how it tests for others before including it in my cube. Perhaps Spellskite.
Not to get too off-topic, but my 360powered cube linked above does run Clocknapper, City of Brass and Caller of the Untamed as slightly off-kilter inclusions, but I do like to think that it's roughly representative of an ideal 360-powered cube.
At conclusion of spoilers:
Definitely in:
Hero's Downfall > Murderous Rider
Lightning Strike > Bonecrusher Giant
Earthquake > Embereth Shieldbreaker
Oracle of Mul Daya > Questing Beast
Terramorphic Expanse > Fabled Passage
Watch list:
Brazen Borrower
Rankle, Master of Pranks
Robber of the Rich
Once Upon a Time
List: https://cubecobra.com/cube/list/opterown
Pretty good overall. Most sets I only get 1-2 cards for a 360-powered cube, but 5 is nothing to sneeze at!
Definitely in:
Bonecrusher Giant
Murderous Rider
Questing Beast
Embereth Shieldbreaker
Watch list:
Once Upon a Time
Rankle, Master of Pranks
Not a bad set at all!