Everything

A potent psychic ward can incorporate Mind 4 in order to turn people’s minds around when they pass into the protected space. The details are too elaborate to go into right here, but can be found under Puppetry and Forging Memories in the Uncanny Influence section, p. 122-123. In this case, however, the trespasser simply suffers an Effect that was built into the ward during its creation; the mage who created the ward cannot control the trespasser from a distance, but merely determines what a trespasser will think when he enters the protected space.

Let’s say, as an example, that Jodi Blake has cast this powerful ward on her favorite hideout. A trespassing character who falls under the ward’s influence sees an empty room instead of the furniture that’s actually present… or suddenly starts thinking

that mass murder is a great idea… or takes his clothes off and starts dancing madly in the center of the room… or… or… or…

Again, an affected character can try to resist the influence of this ward. A mage who’s powerful enough to establish such protections, though, is going to be pretty hard to resist.