How to get the False Idol and the Eye of Rubiss in Dragon Quest II
Dragon Quest II: False Idol and the Eye of Rubiss

Found at the bottom of the Sea Cave, the False Idol is used in conjunction with the five Sigils to obtain the Eye of Rubiss, an extremely important key item for the end of Dragon Quest II.

Before the guide, a few Quick Tips:

  • Safe Passage: The Sea Cave is covered in lava, so make sure you have enough MP to cast this spell quite a few times.
  • Cave Treasures: This dungeon has quite a few stat boosting Seed Items, as well as an incredibly worthwhile Magic Armour to get.

Sailing to the Sea Cave

Path from Dirkandor to the Sea Cave (1) | Dragon Quest II
Path from Dirkandor to the Sea Cave (2) | Dragon Quest II
Path from Dirkandor to the Sea Cave

Sailing southwest from Dirkandor will bring you to an island that appears to be entirely fenced in by impassible jagged rocks. 

Putting the Moonshard to use (1) | Dragon Quest II
Putting the Moonshard to use (2) | Dragon Quest II
Putting the Moonshard to use (3) | Dragon Quest II
Putting the Moonshard to use

Stand at the southern side of the island, and use your recently acquired Moonshard, however, and you’ll watch the barricade disappear. Congratulations! Dock your ship and head inside the Sea Cave.

Finding the False Idol

Safe Passage is invaluable here | Dragon Quest II
Safe Passage is invaluable here

Note: Inside the Sea Cave, you’ll find that the entire dungeon is full of bubbling, red-hot lava. As you can imagine, lava will hurt you every time you walk over it, much like the damaging tiles in jails and other areas. Fortunately, like the aforementioned damaging tiles, you can avoid this problem by having your Prince frequently cast Safe Passage. 

The route to the second floor
The route to the second floor | Dragon Quest II
The route to the second floor | Dragon Quest II
The route to the second floor

From the first floor, follow the path southwest into a room with stairs heading down.

You can avoid most of these stairs | Dragon Quest II
You can avoid most of these stairs

The second floor is full of stairs that branch off to dead ends and treasure chests that may have Gold or Seed items, but are also just as likely to be trapped, causing your party members to become poisoned. If anyone in your party does end up poisoned, have your Prince cast Squelch on them, which functions like an Antidote.

Once you’re ready to proceed, make your way through the lava-filled route to the northwest corner and descend the stairs.

Steer clear of the poisoned chest, you need all your MP for combat and Safe Passage | Dragon Quest II
Steer clear of the poisoned chest, you need all your MP for combat and Safe Passage

The third floor features a door you need to unlock with your Gold Key, which should be second nature at this point. From where you emerge, head west through the torchlit corridor, ignoring the poisoned chest to the east and the staircase between chests. Grab the Seed of Strength from the western chest and head south.

Magic Armour is very much worth the slight detour | Dragon Quest II
Magic Armour is very much worth the slight detour

Circle the southern wall to arrive in a room full of staircases. Before you go down any of these, however, open up the chest in the northwest corner for some elusive Magic Armour. 

Some notes on the armor compared to what you (likely) have equipped:

  • Tectonic Plate: +47 to Defense, can only be wielded by the Hero.
  • Magic Armour: +42 to Defense, reduces spell and breath damage by 25% 

This is endgame armor for the Prince, but will also serve your Hero well until you get Erdrick’s Armour in the Cave to Rendarak, as the amount of enemies with powerful magic will only increase from here.

Once you’ve gotten your hands on the Magic Armour, head for the closest southeast stairs.

This is the staircase you’re looking for | Dragon Quest II
This is the staircase you’re looking for

Similar to the second floor, on the fourth floor the correct way is through the northwest corner, this time down some stairs against the wall.

A few Whackolytes stand in your way, but it’s nothing you party can’t handle at this point (1) | Dragon Quest II
A few Whackolytes stand in your way, but it’s nothing you party can’t handle at this point (2) | Dragon Quest II
A few Whackolytes stand in your way, but it’s nothing you party can’t handle at this point (3) | Dragon Quest II
A few Whackolytes stand in your way, but it’s nothing you party can’t handle at this point

On the fifth and final floor, follow the path to the cave’s inner sanctum, where you’ll be thrown into a battle with several Whackolytes protecting the False Idol. They’re nothing special, however, and should go down with some solid physical attacks and a Kaboom from the Princess. 

What luck! | Dragon Quest II
What luck!

Once the enemies have been dealt with, head north through the sanctum to claim the False Idol. Congratulations!

Getting the Eye of Rubiss

Now that you have everything, you’re ready to get the Eye of Rubiss.

The Shrine is right next to Dirkandor (1) | Dragon Quest II
The Shrine is right next to Dirkandor (2) | Dragon Quest II
The Shrine is right next to Dirkandor

Sailing from Dirkandor, head straight west, and you’ll arrive at the Shrine of Rubiss in no time.

Rubiss’ blessing (1) | Dragon Quest II
Rubiss’ blessing (2) | Dragon Quest II
Rubiss’ blessing (3) | Dragon Quest II
Rubiss’ blessing

Head down the many flights of stairs, approach the center, enjoy the scene, and give yourself a pat on the back for getting the Eye of Rubiss.