These are generically powerful pieces that synergize with the deck as a whole and deserve a mention
Different time
For example, Magic has hundreds of cards featuring different kinds of goblins with different looks, abilities and names, all united by the creature type goblin. And of course, when you summon the card Goblin King to grant your goblins +1/+1 stats, it applies to all of them
I know that a lot of people are skeptical of them, but I really think that they have a lot of potential if they manage to make them fun and easy to play
The most obvious is to mill your opponents deck from different angles with cards like Glimpse the Unthinkable, Kitsune's Technique, Umbris, Fear Manifest, Krang & Shredder, Tasha's Hideous Laughter or Space-Time Anomaly
First, it allows you to help make creatures evolve by pumping up creatures as they come into play