Alarm Ward

A ward that can be placed on a normal-sized room or can be combined to ward off a house or larger area. Each ward can cover a 40ft radius. For each Alarm Ward placed in the same area as another Alarm Ward, this radius increases by 40ft (For example, 120ft with 3 Alarm Wards). If someone other than you passes through the ward, the ward triggers creating a loud ringing noise that persists until the ward is disabled. Casting this takes 10 minutes of uninterrupted casting. Once triggered, the field remains active for 5 more minutes before vanishing. At the time of casting, you may choose people that can pass through the barrier without triggering it. If not triggered, Alarm Ward lasts until you remove it. For each Alarm Ward you maintain, your maximum mana is reduced by 1. This is considered a tier 1 ward.