What will happen if you use Ring of Magnetism on Command Knight while Marauding Captain is on the field?

Answer 1

Marauding Captain's effect states that as long as there is another Warrior-Type monster on your side of the field that your opponent cannot select another monster as an attack target. Command Knight's effect states that while at least one other monster exists on your side of the field, your opponent cannot select this card as an attack target. If you were to play Ring of Magnetism upon Command Knight, your opponent would have to attack Command Knight, but they cannot, because you would be controlling Marauding Captain as well.

In short, your opponent would be in "attack lockdown" since they cannot attack what cannot be targeted (i.e, Command Knight), and since Command Knight HAS to be targeted because of Ring of Magnetism, your opponent simply cannot attack.

Well, until your opponent destroys Ring of Magnetism. Or Marauding Captain. Or Command Knight. Dark Hole, Raigeki, Tribute to the Doomed, Dark Core, Fissure, Heavy Storm, Harpie's Feather Duster, Twister, Dust Tornado, would all kill this combo.

Sorry to ramble. Hope it helped.