If you have all cheap, small creatures, then a single big creature can shut you down
In particular, using it casually on a random spell with a mana value of 3 or 4 before a big action on your own turn is primarily for mana acceleration, which is a very aggressive way to use it
They obviously dont show up often, but when they do they go for about $10,000
While this might be a case of the Pokemon's limited exposure thanks to being locked behind DLC, it's going to take some time and likely an exceptionally strong, playable card for it to appeal to a wider TCG audience
Cavern isnt a card that youll find spread through many decks, but in tribal decks, its going to be incredibly powerful to shut off opposing counterspells
Illustrated by Domenico Cava Standard Not Legal Alchemy Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Not Legal Comp