Arcon's Blood?

So you want to acquire 4031005? Hah ... that's not for a nobody like you. Can't have 4031005 in your hand unless you're the strong one ... If you really want it, prove me wrong and show me that you really are strong enough and worthy of it...

There's a huge cave underground in the middle of this island ... and in the deepest part live the mutants of Arcon. Take down those monsters in the cave and collect 40 pieces of 4000008. Are you brave enough to put yourself in there?

That's right ... 4000008 looks like this . I'm doing this for a first-timer like you, so be thankful.

Hmmm... I may have underestimated you... alright, here's 4031005, since a promise is definitely a promise. Take it.

It's the bottle that contains the blood of Arcon that I have slain before ... Hopefully you'll use this wisely, because it's a rare, precious item...