Although presented as a family name, the powers and personality of the character The Lich are modeled after the fantasy monster "lich", a type of undead creature. However, while borrowing numerous details from from the Dungeons & Dragons description of the monster such as the concept of using a phylactery to store it's soul, the name is repeatedly mispronounced "lick" with a hard 'k' instead of with a 'ch', as in the word "change".
This episode is the first time Bo takes the chi of multiple people at a distance