There are multiple cards that care about the number of creatures you control such as Riona Heartilly and Snow Villiers to encourage you to go into Selesnya if you get them in your pool
Rebel Clash #121
Madison Li Dynaheir, Invoker Adept Flamehold Grappler Gavi, Nest Warden Ghost-Spider Jodah, Archmage Eternal Kate Stewart Mantis Rider Narset, Enlightened Exile Narset, Enlightened Master Narset, Jeskai Waymaster Nia, Fabled Skyclimber Saint Traft and Rem Karolus Satya, Aetherflux Genius Sevinne, the Chronoclasm Shiko and Narset, Unified Sokka and Suki Sokka, Tenacious Tactician The Archimandrite owyn, Shieldmaiden
TISHANAS TIDEBINDER Tishanas Tidebinder has some scary-good rules text
Ninjas in Legacy Tribal decks in Magic the Gathering are fun
So show off your error cards, common or one-of-a-kind, it doesnt matter