In this case, the different colors of mana spent will be considered zero
There are already some cards that care about multicolor creatures like General Ferrous Rokiric and Hero of Precinct One
Cards like Strionic Resonator, Weaver of Harmony, and Fractured Realm can double the abilities you get from courts
Aarakocra Sneak Avenging Hunter Bloodboil Sorcerer Caves of Chaos Adventurer Dungeoneer's Pack Explore the Underdark Feywild Caretaker From the Catacombs Goliath Paladin Loot Dispute Passageway Seer Ravenloft Adventurer Rilsa Rael, Kingpin Sarevok's Tome Seasoned Dungeoneer Stirring Bard Tomb of Horrors Adventurer Trailblazer's Torch Undercellar Sweep Underdark Explorer Undermountain Adventurer Vicious Battlerager White Plume Adventurer
They may not Doom Blade your Kami of the Crescent Moon for a bit, as they look for just a few more things
I kept re-reading it trying to see if there was something I missed that made it easier, but no, it's exactly as slow as you think it is