As a fun piece of Magic history, the term comes from a classic card called Rampant Growth
For example, Raiyuu's triggered ability won't trigger if you attack with multiple creatures and all but one of them are removed from combat
"First Edition" cards are from the very first print run and feature a small "Edition 1" stamp
Look, all concessions to you people who play Titania, Protector of Argoth and say, But but but but you also create three 5/3 creatures! Im going to say, Okay, and for all those times you didnt have Titania on the battlefield? Horrible city
Even without any extra support, this means youre aiming an 11/11 Trampler at each opponent
Urzas Saga helped a lot of archetypes becoming much stronger than they were before, adding a lot of consistency and an alternative win condition to their shells