Talk to Murkwater Mark in the Hub

8/19: I gave you some Marks of the Angler, that's because I knew Mark would want them. They'll sell anything they can to get ahold of those marks, though I don't know why. Buy a Trophy of the Depths so we can unlock the secrets of the Depths.

Buy a Trophy of the Depths

9/19: Now that you have that, it's time to put it to good use. The Pond of Power lets us tap into the Depths of the Angler. Before you ask, I have no idea what is going on here. I just fished this thing up and Murkwater Mark showed up later. Atypical to normal Pirrot fashion, I'm just happy it wasn't too violent a meeting. Interact with the Pond of Power and select the Bubble next to the starting yellow one. Use the Trophy of the Depths and upgrade it to obtain some power from the Depths.

Upgrade a Depths of the Angler Bubble

10/19: Alright, you look a little, tingly, do you feel tingly? Well I felt tingly after I did that, so I really just wanted to let you know the tingly feeling was normal. Regardless of tingles, now you have the Aura of the Angler. Now when you fish you should find Marks of the Angler from time to time. Go ahead and try it out.

Fish for a Mark of the Angler

11/19: Awesome Trovian, you're a real 'shark' when it comes to fishing, ca-caw, I got a million of 'em. Well now that you've got some more Marks of the Angler you can get more Trophies fo the Depths, so grab a few and upgrade some more Bubbles, if you want.

Upgrade more Bubbles

12/19: Easy as fishing. Well, you might have noticed that there's a new face in the Grotto. Freshwater Fran is at the helm of the ship and has new special orders for you to fill. Talk to her and buy one of them so we can get back to the real stuff, fishing!