Death Clouds a nasty card thats only used by two types of players: those who wish to watch the world burn, and Tergrid, God of Fright players, who also incidentally love to watch the world burn
Rounding out the deck are Bart as a backup sacrifice outlet and some removal, including Loran of the Third Path for artifacts and Starfall Invocation, which is generally worse than Sunfall as a wrath, but since our deck is built around death triggers, we'd much rather be Starfalling than Sunfalling
This works specifically, whenever you cast instants or spells on a creature you control, allowing you to exile the card after resolving it, instead of putting it in your graveyard to then be put back into your hand on the next end step
And for the exact same reasons, Pokmon changed it for the Western release to not entice children into gambling, and changed it to a closer look at the game screen, which removed any of the "gambling" parts of the machine
Sets with only one of those can fade after launch