omer, King of Rohanomer, King of Rohan, Ash, Party CrasherAsh, Party Crasher, and Kalemne, Disciple of IroasKalemne, Disciple of Iroas all have the ability to get tall, but lack any support for going wide
You'll see a variety of decks playing Erode outside of the Pro Tour Secrets of Strixhaven Top Eight, including ones that don't care how many cards they give to the opponent
Quantum Riddler gets around both removal and counter spell here, and replaces itself with a card (or two!) drawn should it not end up exiled to be Warped later
Brainstealer DragonBrainstealer Dragon seems like a worse Etali, Primal StormEtali, Primal Storm at first, because you have to pay for the stuff you exile
Where Koma, World-Eater excels is that you get to make four 3/3 tokens whenever you deal combat damage
Number 397 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (7/23/2021) The "otherwise" in the last ability refers to whether or not you put it onto the battlefield, not whether or not it's an artifact card