It can be counted by, fetched by, or trigger abilities that care about the matching creature type
2 Lacrima The Crimson Tears More Fiendsmith Support The Fiendsmith archetype has proven to be one of the deadliest archetypes due to how easy it is to get resources in the graveyard
4 Gaea's Cradle The Best Land For Creature Decks Gaea's Cradle is one of the best lands ever printed, and if you're playing a creature deck, you want it inside of it (assuming you can afford it since it is a Reserved List card)
Sorry Magic world, but it had to be done.
So if someone was unable to actually flip the card for whatever reason, they would be at a disadvantage
I dont think theres a way to really break him without playing white, but you shouldnt be playing Muldrotha if youre looking to set up an infinite combo