If you want to go further, you'll need to take a harder test, same as before. So what do you want? Do you want the new test?

Then go to [map 270030400] and defeat the Chief Oblivion Guardian. If you defeat 300 of them, I will grant you permission to go forward.

That's too hard for you? Sorry, I guess this is where you stop then.

You've defeated 300 Chief Oblivion Guardian. That's amazing. I will grant you the permission as promised.

Go on. You should be able to go up till [map 270030500]. But, you can't go beyond that. If you want to go further... you'll have to take a new test.

As the representative of Rhinne, the Goddess of Time, I grant you permission to look back at your 5th oblivion.

You haven't defeated 999 Chief Oblivion Guardian yet. I don't think you are strong enough to walk against the flow of the past yet.