Inefficient, but if you cant afford the good tutors or can and are using busted black fast mana in your cEDH K'rrik, Son of Yawgmoth monster, Dimir House Guard does the work
If you are playing a budget deck and want some good color fixing options, these 5 ally tapped fetch lands are absolute bangers
If you do need another card, or want to skip the revealing part, discarding a Vault of Whispers and sacrificing a Dockside Chef puts the necessary card types in your graveyard, and puts Demonic Counsel right in line with Demonic Tutor
The version above, with adorable art from Mizutametori, is only available at Commander Box League or Two-Headed Giant Commander night events from November 21st to January 15th
On the other hand, Ruric Thar really does slam the door on certain control decks, demanding that they have an immediate wrath (and even sometimes killing them if they do)
Combos and Interactions This isnt really a deck thats awash with combos to play, but there are a lot of synergies to pay attention to