If you control a Machine monster: Change your opponent's Attack Position monsters (if any) to Defense Position, also, until the end of this turn, if a monster(s) is Normal or Special Summoned to your opponent's field, change them to Defense Position.
Switches all monsters your opponent currently controls, as well as monsters that would be summoned after the activation of this card to defense position
Effect does not target.
Must control a Machine monster in order to use this card.
If your opponent's monster can switch their position since it was summoned on the previous turn, activating Pulse Mines will switch them to defense, but they can switch it back to attack position.
Tips, Related Cards, Rulings
Although this card has good effect, its versatility still does not surpass cards like Enemy Controller, Windstorm of Etaqua, Curse of Anubis, in terms of position switching cards, the primary reason is that these cards does not have the prerequisite of having a Machine-type monster on the field in order to activate.
If you are to include this card into your deck, it is recommended to put at most 2 copies to make room for other versatile alternatives.
This card can be activated during your opponent’s Main Phase or Battle Phase, strategically it is recommended to activate during their Battle Phase, first reason is to catch your opponent off guard, second reason is to prevent them from adjusting their strategy during their Main Phase.
The strength of this card compared to other position-switching cards is that, during that turn this card is activated, all your opponent’s existing monsters, and would-be Normal Summoned/Special Summoned monsters, will be forced into Defense mode, this potentially disrupt current meta decks, such as Red-Eyes decks, which can activate Red Eyes Spirit during Battle Phase to Special Summon another Red-Eyes monster for a follow up attack; and also Ninja decks, which has the potential to perform multiple attacks using their Transformation/Duplication traps during Battle Phase. All these Special Summoned monsters are forced into Defense mode until the end of the turn Pulse Mines was activated.
It's a common miss understanding you see machine ancient ritual is what I like to call a fake and a imposters it's a ritual card but it put machine in its name so it can pretend to be something it's not it's trying to fit in with the new surge of machine support it wants to deceive you and have poor folks like op here to fall for it's trap try reading the fine lines and it will be easy to spot