Eldrian understood that things would never be so simple. Their mana was being kept perfectly in the form of a human being. With mana sense, they were closer to humans made of lights than ghosts.
Stealing their mana would not be easy. Most tricky of all, Eldrian had yet to see much loss in this mana—outside of when they canceled his spells. This meant they weren't weakening as time passed. Their time limit would simply suddenly cut them off from the world when reached.
Making the entire situation worse, Eldrian had no clue just how long that limit could be. He certainly couldn't wait here to figure that out. His guildmates could hold for a while more, but there was no guarantee they could last longer than the ghosts.
'And that brings me to how to actually deal with them.' Eldrian commented to himself, slipping his Mageia into the mana composing their ethereal forms. Testing the mana, so to speak.