All good points, well made. Revised as follows:-
Entrance
Duration 10, Magnitude 3, Progressive, Ranged, Resist (Persistence)
This spell puts a sentient (i.e. not possessing fixed INT, such as an animal, golem or mindless undead) target in a hypnotic trance. The caster must be able to maintain eye contact with and talk to the subject throughout, and the caster must understand and speak the subject's language. The subject is allowed an Insight roll to realise what is happening; if he succeeds, he may make a Persistence roll to break the spell. Otherwise the subject enters a deep trance and becomes extremely suggestible, following the caster's simple instructions. Harmful instructions, such as ordering a victim to attack his friends or himself, automatically break the spell. Overly complex instructions, or dangerous and stupid actions, allow the victim an Insight test to realise that he is under the spell's influence, and a Persistence test to break it. However, simple instructions such as "remove your clothing" and "forget that you were in a trance" will tend to be obeyed without questioning. As part of the spell, the caster can implant a post-hypnotic suggestion that allows the caster to continue to control the victim after the spell has faded, giving the caster a bonus equal to +10% per point of Magnitude to one skill from Influence, Commerce, Courtesy, Oratory, Seduction or Teaching skills with that victim - the caster chooses the specific skill when casting the spell, and it cannot be changed later without another use of this spell.