It was previously hinted at in the reminder text of Atraxa, Grand Unifier
Of course, I would only do this in a casual environment where Im familiar with the players and only if there were no other viable way to make a proxy at that moment
Commander Banned and Restricted Announcement February 9, 2026 Announcement Date : February 9, 2026 Commander Effective date : February 9, 2026 View the list of all banned and restricted cards by format
For each creature that died this way, put a creature card from the graveyard of the player who controlled that creature the last time it became blocked by that Wall onto the battlefield under its owner's control
Most cards that look for a certain threshold of life gained check for 3 or 4 life, so this is right on the money
Proxy Kings is a great way to round out a deck, though far from the best option if you want to purchase a proxy deck from scratch