I broke down today and opened my God Fire Convoy with God Master Sword Giftset to take out the Master Sword.
I mean, there's swords and all and then there's the incredibly insane awesomeness that is the God Master Sword!!!
Making its only reappearance since Transformers Headmasters, the Master Sword is summoned by God Fire Convoy in the last moments of Car Robots/Robots In Disguise to defeat Devil Gigatron/Galvatron.
Takara only released it in the special translucent Toys R Us Japan giftset and they even retooled the original Fortress Maximus Master Sword so that it has a long handle that allows more normal bots to wield it.
Of course, Stampy has a problem holding it up.
Then again, the sword is also about 7 times his height!!!