If you want protection against effects like this, you can use Starlight Road
There are basic Energy cards (like Fire, Water, Grass, Lightning, Psychic, Fighting, Darkness, Metal, Colorless, Dragon, and Fairy, although Dragon and Fairy are now typically represented by other types or Colorless in modern sets) and special Energy cards, which often provide additional effects alongside energy
Selling 5,000 commons to a dedicated bulk buyer is a completely different process than selling a curated lot of 200 holos on eBay
Copycat Carnival: Duplicate token generators or token-producing creatures using cards like "Rite of Replication" or "Clone Legion." This multiplies your token production, leading to overwhelming numbers on the battlefield
It's not hard to see why Mew ex has demanded a place near the top of this list