I mean, it's right there.

[quote]One day, Morganna took notice of how certain people in our world were having their lives cut tragically short. Feeling pity, she decided to reincarnate these people in her domain, giving them new bodies so they may continue their lives anew. When these "Children of the Otherworld" were discovered to have great potential for magic, creation, and destruction Drasil took notice and sought out Otherworlders of his own to challenge his sister's creations. [/quote]

One did it out of pity, the other did it because his sister did.