The textbook example of this is Ancestral BladeAncestral Blade
Topsun Blue Back Charizard Japanese ($493K) Card Value: $493,230 Grade: PSA 10 The Topsun Charizard Blue Back is a weird card and is not even part of the official Pokemon TCG
Consider cards like Resilient Khenra, Quarry Beetle, Hour of Promise, Sand Strangler, Without Weakness, Doomfall, Hour of Glory, Tragic Lesson (for your landfall triggers), Strategic Planning (for filling up your graveyard), Countervailing Winds, Saving Grace, and the cycling Deserts as good examples of the utility that Hour of Devastation has
You can design the next iconic chase card that gives someone that unforgettable jolt of excitement when they open a pack
In my opinion this card would be more viable if Rare Candy had not been weakened as you would have a lot more Pokmon running about without a stage one in between and thus really slowing them down if you devolve them and they do not have the right cards to recover that stage two next turn) Stormfront Conductive Quarry Stadium: Once per turn, a player may flip a coin