The Emperor of Palamecia A mana dork for spells, The Emperor of Palamecia combines it with growing when you cast bigger spells, and as The Lord Master of Hell can potentially deal a lot of damage to foes, but really wants some evasion
Red also has a ton of other effects that will let you do this, such as Jeska's Will and March of Reckless Joy
You do need to be getting in there for The Shadow Lord to shine, so draft a deck that can do that
Topiary Stomper Topiary Stomper is good for both mana ramp and mana fixing in multicolor decks
Then the God of Slaughter is up your aisle
Protect high-lore characters like Atitaya Fang General, Cri-Kee Lucky Cricket, or valuable characters like Mushu Your Worst Nightmare, as the Evasive this gives last until the start of your next turn aka for your opponents turn too