Savant

"3: Every three minutes, this mask drains life force from its wearer;

"When the mask's life force drops below a certain threshold, it will drain life force from living beings within a five-kilometer radius to replenish itself;

"The rate at which the mask's life force decreases depends on frequency of use. If left unused, it can last up to seven days. If used frequently and unable to replenish life force from the wearer, it can only last 45 minutes;

"The mask possesses living characteristics. Even when in use, it must be closely monitored, otherwise it will attack the wearer and their companions;

"The mask yearns for a complete body. It will entice the wearer and those around them to gradually replace their bodies with mechanical constructs;

"Those enticed by it will not have their life force drained, nor will they be attacked by it.