For the first time in a long time, I enjoyed deckbuilding and gameplay alike at the Bloomburrow Prerelease events
With Metallic Turbo, you can enable your Arceus ex and Mew ex as soon as turn three since they both need only three Energies to function, two of which can be given with Metallic Turbo
White How do I ramp in White
Honorable mentions include Blade Armor Ninja, a rank 4 warrior which allows for more easy OTKs with Meizen since she lets one ninja make two attacks, Borrelsword which i went over a bit earlier, and Underworld Goddess of the Closed World which allows you to get over certain cards like Dragoon since you can use an opponents monster for its summon!
This effect is suddenly worth playing again, it would seem
You've then also got the fact that it's both a creature and an equipment, which means there are more ways to fetch it up in those formats too