Players were put off by the small set size, the modern IP, and especially its use of Beyond Boosters
In fact, theyve done this twice already
With Ashaya, Soul of the Wild, this lets you put a +1/+1 counter on a creature whenever a nontoken creature enters the battlefield
Overall, Clive looks absolutely incredible
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
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