Extinction Event You dont see a lot of 4 mana board wipes that exile in Magic, and while Extinction Event isnt going to deal with every creature in play, the choices it offers you provide much more finesse than the traditional sledgehammer approach of clearing the whole board
Youll be able to get double activations or an activation and an attack out of something, which is excellent flexibility
How it works: A guide to MTG Cascade While the original Nissa Revane still sees some play thanks to its ability to draw elf cards straight from the deck, cards like Nissa, Sage Animist and Nissa, Worldwaker are more useful for drawing lands (and, often, turning them into creatures)
That said, this doesnt detract much from the fact that Klefki is likely going to be a pillar of the metagame for some time
I think we can do better, though, especially knowing that the Soul Stone variants are hyper-premium