Tales of Middle Earth and Doctor Who have seen great success since, but Universes Beyond: Warhammer proved that MTG had the potential to deliver crossover sets that satisfied fans all around
At first blush, at least, Prototype has the hallmark of a solid keyword in that its reasonably simple to understand at a glance while simultaneously expanding the branches of your in-game decision tree in interesting ways
Overall, Clive looks absolutely incredible
For example, if you control ten permanents, lose control of one, then planeswalk to The Golden City of Orazca, you won't have the city's blessing
The chaos effect helps fuel the primary effect, while also helping out those same control decks find answers as the creature decks refuel