This three-color legendary creature does a lot, with an ability that triggers for the first three creatures that enter the battlefield under your control each turn
This is doubly important because, while we can rely on McDuck Manor in theory for a win condition, we cant afford traditional board wipes such as Be Prepared or Sisu Empowered Sibling
To that end, I think the decision will ultimately come down to how relevant the sacrifice ability is on the card
Commander decks are still limited when it comes to hybrid mana, but Cold-Eyed Selkie could easily go into a mono-blue or mono-green deck in any other Constructed format, or in Limited
The double-sided, half-land cards have the potential to shake up how we view deck construction
Like Vault of Whispers, this is a land, so we can't just replay it