The best thing about Cogsworth - Illuminary Watchmen is that it's easy to incorporate him into a deck without severe consequences , as he ends up being a cheap card to throw out or functional inkwell fodder in the worst scenarios
And then when it, or another Nightmare or Horror arrives to the party, a target exiles cards from their library until they exile a land, which suggests exiling milling
Archon of Cruelty By way of being one of the best ETB effects on black cards, Archon of Cruelty has made a name for itself as one of the best creatures you can cheat into play, whether thats with Reanimate, Sneak Attack, or Indomitable Creativity
The Steel Wall can block for a very long time, though it's usually wiped away eventually
Magic: The Gatherings Bloomburrow is proving to be a very costly set to collect if you're late to the party, with multiple cards still trending at over $400 and a healthy dose of cards in the $50+ category