Talk:Terminology/@comment-89.110.15.10-20160814072028/@comment-5224367-20160818073457

1) It's implied that so they don't have rely a on absorbing from the atmosphere/environment which is limited and can instead preoidically take from ther hosts. Basically it's easier for them to live that way.

2) Yes, that's kind of the point.

3) The atmosphere/environment. Watch epiosde 3 again. When Emilia is healing Rom there is remark that Reinhard had been holding back from using a Astrea sword techinques since the also draw mana from the area.