2022-10-14 : The ability has no effect on permanents with the chosen name that are on the battlefield.

2022-10-14 : Unlike most effects of this kind, The Stone Brain's ability allows its controller to choose the name of a basic land. Note that you may only search for up to four copies of that card, even if you find more of them.

2022-10-14 : You don't have to choose the name of a card that you've already seen this game; you may guess at a card you think your opponent might have in their deck, if you'd like.

2022-10-14 : You don't have to exile each card you find with that name. If you want to leave one in their graveyard, for example, you may.

2022-10-14 : You target a player as The Stone Brain's activated ability is put on the stack, but you don't name a card until it resolves. Notably, this means that players don't get to respond to the ability knowing what card you will name.