mtg are secret lair cards legal in commander Deck: Everyone's Invited : Toys & Games Rin and Seri, Inseparable |

In The Thing , a murderous shapeshifting horror terrorizes an Antarctic research base by taking the form of its own residents, starting innocuously with a dog

It has been cheated into play by decks using Indomitable Creativity alongside a haste-giver in Pioneer and Modern and even abused for its high mana value in the "Grishoalbrand" combo deck

Control and midrange decks appreciate how it thins the deck slightly while guaranteeing future land drops, and Commander players like having a low-opportunity-cost way to fetch whatever basic theyre missing

Aerith Gainsborough is more expensive, but the built-in lifelink means you probably dont need to worry about where your lifegain comes from

Obviously since I didn't finish yet, there will be more stories to come

Examples of non-rotating formats include Pioneer, Modern, and Commander.