Reddit has some general proxy subs, and there are some for MTG proxies specifically, too
In October 2020, a PSA 10 first-edition shadowless holographic Charizard auctioned for a record-breaking $220,574 to retired rapper and Pokmon fan Logic
Starting with a mechanic idea, it felt straightforward to create some cards with the mechanic and/or that supported the mechanic, then add some generic cards like removal spells and simple creatures
Strong collection of playable cards and more than three potential choices for Top 3
When Dialga ex dies, you can bring this card in to be the last line of defense
To lay out the obvious, removing a card from the format is going to remove something toxic from sanctioned play