Card Tips:Machina Citadel
- This card can be searched by "Machina Redeployment", "Machina Overdrive", "Machina Air Raider", "Machina Gearframe", "Urgent Schedule", "Machina Megaform", "Machina Armored Unit", "Psychic Arsenal", "Revolving Switchyard", "Ruffian Railcar", "Infinitrack River Stormer", "Clockwork Night", "Machina Metalcruncher", "Qliphort Genius", "BOXer", "Frontline Observer", "Link Party", and other generic searchers.
- In an EARTH Machine Deck, this card's first effect combos well with the effects of "Number 81: Superdreadnought Rail Cannon Super Dora" or a Machine-Type Xyz Monster with "Infinitrack Goliath" as material. Both of these cards' effects prevents them from being destroyed by card effects, making them good targets for this "Citadel" effect, since destroying the targeted monster is not required for destroying opposing monsters with ATK less than or equal to it.
- In a "Machina" Deck, this card and "Machina Ruinforce" can work in conjunction, since "Ruinforce" can negate effects that would prevent "Citadel" from resolving, and "Citadel" can destroy monsters with higher ATK by destroying "Ruinforce", which also triggers the latter's effect.