Can you use on one of your monsters when opponent activates effect so can take control it?

You're asking about a card effect that lets you take control of an opponent's monster when they activate an effect. This is a very common effect in Yu-Gi-Oh!, and there are many cards that do this.

Here are some examples:

* "D.D. Crow": This monster can be used to banish a monster on the field when its effect is activated, regardless of the effect's content.

* "Mind Control": A spell card that lets you take control of a monster on the field for one turn.

* "Dimensional Fissure": A trap card that can be activated when an opponent activates a monster effect. It banishes a monster on the field, which can effectively remove it from play.

Important Notes:

* Timing is crucial: You need to activate these effects at the precise moment your opponent activates their monster's effect.

* Effects vary: Some cards only work with specific types of effects, like summoning effects or monster effects that destroy other monsters.

* Cost and limitations: Most cards have a cost to use them (like discarding cards or paying life points) or have other restrictions (like only working on specific types of monsters).

To get the most accurate information on how a specific card works, please consult the official Yu-Gi-Oh! Trading Card Game website or app.

This will give you the full text of the card and any relevant information about how to use it.