Mishras Bauble is a bit more specific than a lot of my entries in this series, but the card supports a fairly wide range of things and exemplifies what I like in a colorless spell very well
The deck, no matter which commander you use really relies on the multiplayer format for a lot of its cards to work
Yamatos leader ability supports both resource generation and board control, making the deck versatile in many matchups
The original five elder dragons were printed in the Legends MTG set: Nicol Bolas, Arcades Sabboth, Vaevictis Asmadi, Chromium, and Palladia-Mors
They are lands that count as artifacts, and they cause no end of trouble
However, when its a creature, if it would deal combat damage to a creature, it instead makes it so that the owner has to shuffle that creature back into their library