Magic

Specifically there are three main kinds of magic used throughout the world of Lodoss:

Shamanist Magic (Used by Deedlit and Leaf) is magic that involves the summoning of assorted spirits to do the caster's will.

High Ancient Magic (Used by Slayn and Wagnard) where magical power is known as mana, it is used by a spell caster to perform a certain action.

Holy Magic (Used by Etoh, Leylia and Little Neese) is magic used for healing or defense, which calls down the power of the gods. A user's strength relies on his or her faith.