Where Koma, World-Eater excels is that you get to make four 3/3 tokens whenever you deal combat damage
Unblockable Enabling Lands When you can use a land for more utility than just mana, you are gaining a massive advantage
Strategy As I've just touched on, Heroes are the name of the game for this deck
So if you have 10 creatures on your board, you can pay just to tutor up seven cards with Diabolic Revelation
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