This effect is simple, clean, and doesnt turn into a brick in your hand
Plus going all-in on a 5-Drop commander that has no built-in protection and requires you to spend additional mana to do anything seems very sus at least in my meta where interaction is so prevelant, as the deck would just fall apart if Gravemother died like 2 times
The decks will each contain 62 new cards designed specifically for the multiplayer mode, and restricting them from use in standard play due to their increased power, as indicated by a new label at the bottom of each card
It also fit in any deck thanks to its colorless casting cost, but we chose Pack Rat for this slot because its apocalyptic approach to winning games is just so much more dramatic
You can turn your deck over with cards like Basalt Monolith, Aphetto Alchemist, and Seeker of Skybreak
Overall, the abilities of it need to be power appropriate for the mana value of the planeswalker