in addition to losing the resource of your graveyard, you wont even get triggers from payoffs like The Gitrog Monster
The more combo focused decks like this most, any deck with any sort of key non-goblin card will lean on tutor effects pretty hard and there are not that many on offer
Unfortunately, blue really gets the short end of the stick compared to colors like green, white, or even red when it comes to both permanent mana ramp and temporary mana acceleration
If youre predominantly running bursty draw or looting in a graveyard-based Rakdos deck, for example, it still might be correct to run cards like Nights Whisper, Dark Bargain or Ambitions Cost if you arent already
Unfortunately, these are likely to be heavily outshined by the Surveil lands from Murders at Karlov Manor for the time being
Declare attackers