Bab 111: 111 Lightning Storm Barrier

"I have been ordered to share one more piece of gear with you before my unit departs for another site, so I might as well do it now. A blessing and a curse, as Command prefers to call it. It's the [Lightning Storm Array], a spell circle that links a large group of Witches to create a defensive shield.

If we are about to lose the camp, I want you to use it and target everyone who is still alive. If they're too weak to sustain their share of the spell, it will burn their life force to supplement the required input, but by using this device, you can make a barrier dozens of times stronger than any individual Witch could accomplish.

The strongest caster gets control by default when it is activated, so I am giving this to you and trusting you not to kill us all."