Dark Law has effects that cripple both, making him a dominant force in both HERO decks and otherwise
Why not the top, cEDH tier, the bottom, precon and casual tier, and the middle, say, elevated play tier with a list of cards that shift the play experience in key ways, like tutors, fast mana, free spells, etc
There are quite a few people who create very ambitious (or ambiguous) posts on Craigslist, either asking for far more than the cards are really worth, or just not giving enough information, so you need to learn to dig through the slag to find the gold
And for those who venture back down the Path to Carcosa, the Ultimatum of the Brass Crown stretches out the long arm of the King even into our reality, threatening your investigators by threatening you, the player