The Rod of the Depths in Fisch is obtained by unlocking The Depths, completing the Depths Maze, and then buying the rod for 750,000 cash. You also need a Depths Key, the full Vertigo Bestiary completed, plus Hexed and Abyssal enchant relics to open the maze door.

Requirements

  • 750,000 cash to purchase the rod.
  • The Depths Key to unlock access to The Depths.
  • Full Vertigo Bestiary completion.
  • Hexed Enchant Relic and Abyssal Enchant Relic.

Steps

  1. Complete the Vertigo Bestiary.
  1. Fish up a Depths Key.
  1. Use the key to open The Depths.
  1. Go to the maze entrance and place the Abyssal relic and Hexed relic on the correct pedestals.
  1. Finish the Depths Maze.
  1. Buy the Rod of the Depths for 750,000 cash.

Practical tips

  • The Depths Key is described as a fishable item, so you may need some patience.
  • The relics can be fished or appraised, depending on the guide you follow.
  • Once the maze is opened, the rod becomes purchasable in the Depths area.

What this means

In plain terms, the grind is mostly about three things: finishing Vertigo, getting the key, and finding both relics. After that, the maze is the last gate before the purchase.

TL;DR: unlock The Depths, complete Vertigo, get a Depths Key, bring Hexed and Abyssal relics, finish the maze, then pay 750,000 cash for the Rod of the Depths.