1 Tuner + 2 or more non-Tuner monsters This card cannot be Special Summoned except by Synchro Summon. When this card destroys a face-down Defense Position monster by battle and sends it to the Graveyard, draw 1 card.
The fact it's generic makes it solid enough IMO. It should've been at least R, and I wouldn't have been upset at it being SR. The only thing Giganticastle has over it is Ancient Gear and Koa'ki Meiru having 3k monsters.
I like them for their lore. And the problem with Field Marshal's rarity is that it requires 3 monsters on the field for its synchro summon, while Gidankicastle is easily made with 2.
Didn't these dudes went crazy and attacked their creators in the Duel Terminal Story? Also, why is Seigi no Mikata Kaibāman an Ally of Justice? it makes no sense unless my theory about them attacking their creators is actually spot on...