The important thing is that these creatures are good mana sinks and they're flexible enough to see play or to leave your opponents guessing about what abilities you might activate
Goblin Anarchomancer is a little questionable since discounting mana costs to cheat Prossh onto the battlefield a turn earlier means that youll make one fewer Kobold, but discounting so many other spells has kept it in my list so far
In addition to that, being restricted to casting one spell a turn is backbreaking for some decks like Storm
I tried putting together a decklist that combined Esika, Kinnan, and Kolvori and couldnt come up with anything satisfying quite yet, but it feels like its only a couple of legendary creatures away from being able to do some disgusting things, so keep your eyes open as preview season continues to find out whether such a deck can become a reality
There arent a ton of decks whose mana includes easy Azorius access these days, but Meddling Mage is a good way to diversify your hate cards in the face of counter-hate