Mana barriers

p. 185

Treat as barriers having both armor and structure of force.

Adds force to defense for spells cast through them on the astral plane.

Lodges has a barrier equal to force.

Wards

Max area 50 cubic meters x magic. Many magicians can combine for a larger area. 100 nuyen an hour per magician to maintain.

Ritual of 1 hour x force. No materials. Magic + willpower. Hits scored is the number of weeks the ward lasts.

Made permanent by paying karma equal to the ward's force.

Drain equal to force.