Explosive Ward

A ward that can be placed on a door or medium-sized container of some sort. If other than you knowingly tries to open the door or container in any way (whether normal opening, attacking it etc), the ward triggers creating a loud noise and dealing Heavy Fire Damage to all creatures in a 10ft radius around the container. All items inside the container (if any) also take this damage. Once triggered, the bounded field vanishes. Casting this takes 10 minutes of uninterrupted casting. You may at the time of casting choose a number of people equal to your Focus that can also open the container or door without triggering the ward. If not triggered, Explosive Ward lasts until you remove it. For each Explosive Ward you maintain your maximum mana is reduced by 2. This is considered a tier 2 ward.