There were initially discussions of only cards which could plausibly be on Ikoria, and we threw that out the window pretty quickly: it was far too limiting
Full refund guarantee if you receive a counterfeit card
Its decent insurance against targeted removal spells, but its weakness is when a board wipe is cast, theres nothing to move the counters to
Aside from one exception in the Sword & Shield era of the Pokemon TCG (Dark Sylveon V, to be exact), the most recent Dark Pokemon cards at the time of writing are from the early 2000s with the EX Team Rocket Returns expansion set
If gaming pulls some evil out of you, and you like to show cards to your opponent and then make them discard those cards, then you can put these to good use: Razorkin Needlehead, Smothering Tithe, and Fate Unraveler
This dramatic depiction ties directly to Volcanions Pokdex lore, which describes it as being able to create explosive steam by releasing superheated water stored within its body