Undermining

One year of proximal familiarity. Do not engage with the target. The purpose is to familiarise the target with yourself dulling any instinctual warnings the target may have about you.

After one year get in close and tight with the target. The purpose here is to create strong bonds of trust that can later be used for maximum effect. This phase will last a number of years. During this time you will be instructed on specific events or activities in which to engage with the target.

After a period of years the target will be subjected to a manufactured crisis. The purpose here is to neutralize the target. Your job will be to monitor the target and report back on the target's mental state. The target is to be kept at arm's length, removing the security from the relationship and adding to the crisis. No action is to be taken against the target. At the opportune time you will be instructed to sever the relationship, essentially turning your back on the target in the time of their greatest need.

This technique was used on me on a number of occasions over the course of my life.

It is very effective.