The shark didn't care that Luna was trying to stop it! As long as it could get to the octopus and help it out in dealing with Mark, then Luna wouldn't be a problem at all! After all, Luna hasn't even been able to make a single construct that it couldn't take control of! The most important issue right now was KING! If they got rid of KING, then they wouldn't have any issue dealing with Luna!
Luna realized that she was running out of ideas on how to stop the shark! The shark was already far from her, and it was heading straight for Mark! Even if she ran right now, she wouldn't be able to get to it! Luna had to do something! She had to make a new construct! A construct that the shark couldn't take control of!