We have a limited supply of these remaining however we have other machines that aren't themed and cost less
You can only use 1 "Diabolica the Draconique General" effect per turn, and only once that turn
The mana cost is a bit steep, but cards like Zirda, the Dawnwaker and Training Grounds can clear that upplus, its not like artifact decks are known for lacking mana
end the Battle Phase, then face-up monsters currently on the field have their effects negated until the end of this turn
The Balrog, Durins Bane This card scales quite nicely depending on the power level of your Commander deck
While that Token is in the Monster Zone, the player who Summoned it cannot Special Summon from the Extra Deck, except WATER monsters