Well, the top colorless Commander staples that are also mythic rares are Mana Crypt, Mana Vault, Sword of Feast and Famine, Wurmcoil Engine, and Crucible of Worlds
Foils were introduced in Urzas Legacy and 7th Edition , so all the sets before those lack a foil/nonfoil entry
Being a one-mana legendary creature also means she turns on [card]Mox Amber[/card] from turn one, enabling explosive starts where you play Lady Octopus, cast a draw spell, build counters, and immediately cheat an artifact into play
Bladehold War-Whip Ive been underwhelmed by For Mirrodin! cards until now, but double strike is double strike, and three mana is low enough for this to have some utility
For this reason, The First Sliver, The Ur-Dragon, Voja, Jaws of the Conclave, and Atraxa, Praetors Voice are some of the best MTG Commander decks in bracket four
This is largely due to the many printing variants that need to get designed