Players must get the Holy Title and Carbon Crate as part of the Nate Questline. The Holy Title has a 2% chance to unlock when you buy a Lantern from the Lantern Keeper in Moosewood. You can fish for the Carbon Crate in the Open Ocean area using a Magnet Rod & Magnet Bait.
In the Rescue Nate questline, the hardest part is getting the Holy Title & Carbon Crate. If you are one of those players who's confused and stuck at this stage of the quest, this detailed guide will help you progress quickly and get poor Nate back to his base.
How to get the Holy Title in Fisch
Unlike most Titles in Fisch, you don't get the Holy Title by completing a specific quest or meeting a set requirement; instead, it drops randomly with a 2% chance when you buy a Lantern from the Lantern Keeper at Moosewood.

You can find the Lantern Keeper at GPS (710, 165, 335) next to the lighthouse, or slightly farther away behind the Crew Shop at (665, 165, 275). Check both locations and locate the NPC. Now, all that is left is to keep buying Lantern from him until you randomly get the Holy Title. I recommend playing on a server with a high overall luck to increase your chance of getting the Title quickly.
How to get the Carbon Crate in Fisch

The Carbon Crate is the next challenge in the quest, and it's a regionless entity you can find anywhere in water. Still, the best place to find it is the open ocean. So, take out your boat and head straight out until the game notifies you that you are in The Ocean. Here, equip something like the Magnet Rod and Magnet Bait to start fishing until you get the Carbon Crate. You can also pop something like the Aurora Totem and consume the Luck Potion to increase your chances. Also, using something like the Glitched Potion can give you the item as a secondary duplicate drop.
Remember, the Magnet Rod is the best for farming any crate. So stick with it, along with the Magnet Bait, until you get the required Carbon Crate.
For more on Fisch, check out All 25 Tropical Fruit Locations in Fisch - Fruitline Rod or Fisch Boat Racing Guide - Location, Boats & more