Not only do your equipped creatures have the ability to tap a defending creature when they attack, but when Nazahn enters the battlefield, you get to search your library for Hammer of Nazahn
That has lots of card draw potential, especially if you pair it with cards like Rionya, Fire Dancer and Mirage Phalanx that clone it several times over
While Mono-Black decks have access to a lot of top-tier graveyard hate, including the inimitable Dauthi Voidwalker, Mono-Blue decks, or blue decks without black in their identity, arent quite so lucky
Im not going to make a point to do this for every color, but there is one card that is technically white that overwhelmingly makes most Cubes, yet it doesnt feel quite right to give a white slot to today
This is likely because of its pretty unique effect thats nicely suited to multiplayer formats by making things worse for your opponents while better for you