As the ship approached her, she looked around to see if there were any other ships because even though she felt no other ships coming towards her, she trusted her sight more than a feeling.
Luckily though, she saw no other ships approaching, but she did see a holographic red pyramid floating in the sky, and as she looked and see if she noticed that this was where all of her mana was coming from. She was not absorbing it from the open space like the thought but from the pyramid.
This also made her realize why the amount of mana she was absorbing was significantly less than before. She had thought that she had absorbed all the mana from the local area, but that didn't really make much sense since the bombs that blew up the ships all absorbed mana to create their explosions.