If Jenova dies at the same time as one or more Mutants you control, its last ability will trigger for each of those Mutants (including itself if it somehow became a mutant)
Since cycling generally costs one or two mana, no matter what cycling creature you end up hitting with Unpredictable Cyclone, you'll come out way ahead in terms of mana, paying two for a four-, five-, or even seven-drop, which sort of puts Unpredictable Cyclone into the Wilderness Reclamation / Fires of Invention category of absurdly powerful ramp spells that only work in fairly specific decks
Many defender decks love this card, and many toughness-based interactions love to use it instead of something like Tree of Perdition
Ascended Heroes (Released January 30, 2026) Ascended Heroes is the largest MEGA Evolution set so far over 290 cards, 13 Mega Evolution Pokemon ex, and the debut of the Mega Attack Rare (MA), a new ultra-premium rarity that commands $200+ for top pulls
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Arceus has filled that void nicely, and since it's a basic Pokmon, that leaves plenty of room for support cards