Lord of the Nazgl is the better Commander to be sure, but you can probably build a cool Rakdos deck with this anyway

The most effective approach follows the traditional color pie that defines both identity and gameplay mechanics: White - The color of order and protection that focuses on efficient creatures, removal spells, and defensive strategies Blue - The color of knowledge and control that emphasizes card draw, counterspells, and manipulating the game state Black - The color of power and ambition that utilizes life as a resource, creature removal, and graveyard interactions Red - The color of freedom and emotion that delivers fast aggression, direct damage, and chaotic effects Green - The color of nature and growth that ramps mana, plays large creatures, and destroys artifacts and enchantments Colorless/Multicolor - Cards that either require no specific mana or combine multiple colors for hybrid strategies and flexible deck-building options This sets up a very simple organization system: color
So you can play Basilica Screecher in your Judith deck, because its black and not white
Don't get me wrong, there's serious stuff to deal withmutant monsters, irradiated food, ruthless raiders But there's so much charm and strangeness to the world that you can't help but fall in love with it, rads and all
Kiora, the Rising Tide Unlike Kiora, Sovereign of the Deep, Kiora, the Rising Tide provides a ton of value in multiple strategies and builds