Curse of Opulence and Curse of Bounty are my favorites
They run in the same circles, so to speak
It fuels Daretti, Scrap SavantDaretti, Scrap Savant, The Locust GodThe Locust God, and even the semi-thematic Captain Howler, Sea ScourgeCaptain Howler, Sea Scourge (if you have an extra combat at the ready)
There also were at least the following cards that placed/moved damage counters as an attack: Sabrinas Golduck Sabrinas Gengar Rockets Mewtwo Misdreavus (the promo) The same Celebi I mentioned above linkinboss December 25, 2024, 7:00am 81 I agree that damage counters isnt the same as damage

Nox the Lifedrainer Noxel Shroudhaggle Noxious Poison Noxious Trap Nozdormu the Timeless Nozdormu the Timeless One Nozdormu's Presence Nuada Windwalker Numbing Cold Nurgle Tinkfrost Nurture Nurturing Spirit Nuvon Dawnfury Nyala Shadefury Nylaith, Guardian of the Wild Nyn'jah Nyn'jah Nyn'jah's Tabi Boots Oakenclaw Oakenclaw Oathbinder, Charge of the Ranger-General Obfuscate Obliterate Obliterate Obliterate Obliterating Trap Obliveron Obliveron Obora the Mad Obora the Wise Observer's Shield Obsidia Obsidian Colossus Obsidian Drakonid Obsidian Drakonid Obsidian Drudge Obsidian Drudge Obsidian Edged Blade Obsidian Enforcer Obsidian Enforcer Obsidian Pyrewing Obsidian Skyterror Obsidium Cleaver Obsidium Executioner Obsidium Executioner Odo the Blindwatcher Odo's Ley Staff Off the Beaten Path Off With Their Heads

Through the years, the core rules behind the Pokemon TCG more or less stayed the same, but the introduction of various new categories of cards has shifted the moment-to-moment "gamefeel" time and again