In this casual, multiplayer format, you choose a legendary creature or artifact to serve as your commander and build the rest of your deck around their color identity and unique abilities
I Terrorized his Orcish Artillery, and played my Sengir Vampire, but that was Disintegrated
Equip Legendary Artifact - Equipment Sword of Hearth and Home Equipped creature gets +2/+2 and has protection from green and from white
You can hold up mana to bounce something, and if there's nothing significant enough, you can just cast the creature portion on the opposing end step
Llanowar Elves is the quintessential mana dork
Polymorph by Samuel Leng Polymorph is generally not seen in Premodern due to Oath of Druids, Show and Tell, Natural Order, and Reanimate providing more efficient ways to cheat out creatures, but I like Samuel Lengs attempt