On second thought, thats essentially the same as destroying a land
Both of them were weak cards, no better than most Basic Pokmon from the same set
4 Deluxe booster packs from Pokmon TCG: Scarlet & Violet SV11W: White Flare
It has an ability that allows you to keep searching your deck for Water Energy cards (up to 2 per turn, if Chien-Pao ex is in the Active Spot) and an attack that takes advantage of lots of Water being discarded, from any of your Pokemon
In Legacy and Commander, you can use this colorless mana alongside things like Green Sun's Zenith and Sneak Attack for early bursts of pressure
The discard is what pushes Hopeless Nightmare over the edge, and between that and its fast, aggressive damage, it makes for safe ban in respect to the health of the current meta