Even with these splashes, the core of the deck is red, which is why I might consider Razorkin Needlehead as a sideboard option from Duskmourn
Most importantly, because effects on a card are completed in the order they are printed, you can retrieve the card you place into your graveyard with Mythos of Brokkos
Mondrak is a devastating commander coupled with whites fantastic token support in cards like Intangible Virtue and Hour of Reckoning
You need to be careful with Darksteel Forge, though, since you can still be forced to sacrifice your artifacts through any number of spells or effects
Getting free spells is always fun
Card not found is sometimes seen in various sacrfice decks (or more colloqually, Cat-Oven decks), Evelyn is often the top end of vampire decks and Card not found sees some amount of play in Modern, but not really in other formats, weirdly enough