Observe the Gigantic Spirit Vikings

You seem concerned about something. What is it? Hmmm... are you worried that you have not mastered the handling of Battleship yet? Haha, don't worry about it. You just haven't learned the powerful skills that go with the Battleship yet. There's a quick and easy training session for this. Are you interested?

That was a great training session! What was it like facing the Gigantic Spirit Vikings? Weren't they great navigating around the ship while attacking at the same time? I guarantee that if you train yourself a bit harder, then you'll end up much more powerful than them. As a reward for safely completing the task, I'll teach you how to use 'Battleship Torpedo'.

Okay, here's your mission. You are probably still not very good at navigating around with the Battleship. You'll need to have great control over it in order to use other skills. What I'm suggesting here is... how about observing how others sail with ships, or how to fight while on it? If you really watch for it, you'll figure it out, and you'll be better with the Battleship, right?

Go to Ludibrium and you'll encounter a bunch of Gigantic Spirit Vikings. Observe them carefully, and when you feel like you've picked them apart, defeat 150 of them. I also need to see an evidence from you that you really did slay them all, so I want you bring 50 Spirit Viking Tokens with you. If I see that you have really trained yourself in this session, then I'll teach you a new skill.

Battleship Torpedo is a powerful, powerful skill that can only be used when you are on the Battleship. Please use this skill wisely...

I don't think you understand the importance of training, yet. If you want to learn a new skill, come see me.

You need to bring in 50 Spirit Viking Tokens. That's what I'd call training.

You need to defeat 150 Gigantic Spirit Vikings. That's what I'd call training.