Some example cards that don't spell out the rule, but do hint at its existence: https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=442029 https:

Some example cards that don't spell out the rule, but do hint at its existence: https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=442029 https://gatherer.wizards.com/Pages/Card/Details.aspx?multive... > Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards. Graveyard is just a fancy name for discard pile, just like Library is a fancy name for deck. https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=447264 https://gatherer.wizards.com/Pages/Card/Details.aspx?multive... > As Alpine Moon enters the battlefield, choose a nonbasic land card name. > Lands your opponents control with the chosen name lose all land types and abilities, and they gain "Tap: Add one mana of any color." https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=80281 https://gatherer.wizards.com/Pages/Card/Details.aspx?multive... > Choose a nonland card name. Search target player's graveyard, hand, and library for all cards with that name and exile them. Then that player shuffles their library. Exiling is roughly just a more permanent form of discarding/putting in the graveyard. It used to be called "Remove from game". https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=442094 https://gatherer.wizards.com/Pages/Card/Details.aspx?multive... > Relentless Rats gets +1/+1 for each other creature on the battlefield named Relentless Rats. > A deck can have any number of cards named Relentless Rats. This one even hints that there's a limit to how many cards with a certain name can be in a deck. https://gatherer.wizards.com/Pages/Card/Details.aspx?printed=false&multiverseid=2900 https://gatherer.wizards.com/Pages/Card/Details.aspx?printed... > 2, Tap: Sacrifice Apocalypse Chime to destroy all cards from the Homelands expansion. This one I didn't even know existed, this is super weird to me. Completely unplayable in the modern day, but it talks about the fact that there are expansion sets. That's something I thought would only happen in the joke sets they release every 5-10 years. Also note that this was early enough in the game's history that they didn't realize they would reprint cards with the same name in newer sets. It makes it much harder to use because instead of looking for the Homelands set symbol, instead you have to look up whether a card from any set was in Homelands. That's why they don't use this mechanic anymore, but I'm still kind of shocked to find out that they ever did.