I was using metalfoes majespecter qli deck and the AI was using pendulum magicians.

The AI activates the field Sky Arc and no monster no pendulum set.

When I try to aplly my effect of metalfoes to destroy one card on my field the effect doesnt applied.

It is a bug.. because sky arc the effect is: YOUR cards on pendulum zones cannot be destroyed by effects

I think the game not allow me to destroy MY pendulum zones.