Eternal Sand is an Abyss of Time and Monad Door boss in Persona 3 Reload's (P3R) Episode Aigis DLC. Check out how to beat Eternal Sand, Reckoning Dice and Infinite Sand (Judecca), as well as their location, weaknesses, and resistances!

Eternal Sand and Reckoning Dice Boss Overview

Judecca B17 Boss

Boss Overview
Location: Judecca Floor: B17 Recommended Level: 75+

Monad Door Boss

Boss Overview
Location: Judecca Recommended Level: 70+

Eternal Sand and Reckoning Dice Weaknesses and Resistances

Judecca B17 Boss

Eternal Sand Has No Weaknesses

Slash				Strike				Pierce
Weak				Normal				Normal
Fire			Ice			Electricity			Wind
Normal			Repel			Repel			Normal
Light						Dark
Normal						Null

Eternal Sand has no weakness but is suseptible to Physical attacks. Avoid using Wind skills against this enemy to prevent them from restoring HP.

Reckoning Dice Has No Weaknesses

Slash				Strike				Pierce
Normal				Normal				Normal
Fire			Ice			Electricity			Wind
Null			Null			Null			Null
Light						Dark
Repel						Null

Same with Eternal Sand, Reckoning Dice has no weakness but is suseptible to Physical attacks. Avoid using Light skills against this enemy to prevent them from reflecting back at you.

Monad Door Boss

Eternal Sand is Weak to Slash

Slash				Strike				Pierce
Weak				Normal				Normal
Fire			Ice			Electricity			Wind
Normal			Repel			Repel			Normal
Light						Dark
Normal						Null

Eternal Sand is weak against Slash, repels both Fire and Ice and nulls Dark. Using Slash moves from your party members or your Personas can bring this enemy down quickly.

Infinite Sand is Weak to Strike

Slash				Strike				Pierce
Normal				Weak				Normal
Fire			Ice			Electricity			Wind
Null			Null			Null			Null
Light						Dark
Null						Null

Inifinte Sand is weak against Strike, and nulls all elements. Using only Physical moves against them will bring them down and can results into an All-Out Attack.

How to Beat Eternal Sand and Reckoning Dice (B17)

Bring Metis or Junpei for Offense

For this fight, we recommend bringing Metis and Junpei since these enemies will be immnue to elemental attacks. Metis can use charged physical attacks, while Junpei can land critical hits easily thanks to his characteristic.

Additionally, Metis learns Insta-Heal, which allows her to recover from poison quickly!

Either Can Be Replaced by Koromaru

If Metis or Junpei are underleveled, Koromaru can replace one of them and serve as a secondary support with Revolution to boost the team's critical hit rate. He can also use a variety of moves like Tempest Slash, Swift Strike, and Virus Breath, which are all effective against both bosses.

Refrain from Using Akihiko in this Fight

Since Eternal Sand uses Bufudyne a lot, we do not recommend bringing Akihiko along to this fight despite his Physical affinity. If you still wish to bring him, equip an accessory that allows him to dodge Ice attacks.

Bring Yukari for Support

Yukari will be a much better support in this fight since she can learn Amrita Drop to cure poison and can hit Reckoning Dice with her wind moves if she needs to go on the offensive.

Equip Alicorn to Get Null Poison

Eternal Sand will always use Poison Mist to poison the entire team. You can counter this by equipping Alicorn, which is easily obtainable from Mayoido Antiques.

It will require a 1 Nihil Ore, 1 Soul Sea Driblet, which is obtainable from Heart Items, and 10 Malachite.

List of All Heart Items

Use Futsunushi

If unlocked, Futsunushi can be a great persona to use here. It's not weak to any of the attacks from either enemy and can learn Bloody Charge and Vorpal Blade. If fused using Raphael, it can also take Tempest Slash, which you can use early on as you focus on Reckoning Dice.

Raphael and Melchizedek are good alternatives to use over Futsunushi if you are underleveled for this fight.

How to Fuse Futsunushi

Defeat Reckoning Dice First

Since the fight will mostly revolve around the use of physical moves, it's best to defeat Reckoning Dice first since it can use Tetrakarn on Eternal Sand. It can also use Divine Judgment, which can cut your HP in half.

Eternal Sand will be the offensive enemy in this fight, but keep in mind that it can use drain skills to heal itself. Focusing on it will just take a lot of time, especially if it gets shielded with Tetrakarn.

How to Beat Eternal Sand (Monad Door)

Bring Your Physical Party Members

Koromaru and Junpei are valuable allies against these enemies since they bring both Slash and Strike moves that can down these enemies quickly.

Metis and Akihiko are also great choices to pick but bringing Koromaru or Junpei's Fire affinity can help for the other bosses in this Monad Door.

Focus on Infinite Sand First

Infinite Sand has access to Eerie Sound which can inflict Distress on all party members, which can be difficult and may result in crtical hits against the party. Use Koromaru's Swift Strike or Junpei's Assault Dive to beat them quickly.

Persona 3 Reload (P3R) Related Guides

List of All Bosses

All Episode Aigis Bosses

Mini-Bosses
Wrathful Book	Wondrous Magus	Harem & Natural Dancer
Harmony Giant	Frivolous Maya	Avenger Knight
Spastic Turret & Slaughter Drive	Acheron Seeker & Ice Raven	Killer Twins
Eternal Sand	Onnen Musha	Neo Minotaur
Story Bosses
Metis	??? (Shadow Protagonist)	Akihiko and Ken
Junpei and Koromaru	Yukari and Mitsuru	Erebus
Super Bosses
Joker	Reaper	-
Monad Door Bosses
Phantom Mage (Cocytus)	Elegant Mother (Cocytus)	Red Sigil (Cocytus)
Chaos Cyclops (Caina)	Eternal Eagle (Caina)	Nemean Beast (Caina)
Judgement Sword (Antenora)	Grand Magus (Antenora)	Minotaur III (Antenora)
Emperor and Adamant Beetle	World Balance (Ptolomea)	Death Castle (Ptolomea)
Crazy Twins (Ptolomea)	Eternal Sand (Judecca)	Void Giant (Judecca)
Vehement Idol (Judecca)	Rampage Drive (Judecca)	Phantom King (Empyrean)
Fanatic Tower (Empyrean)	Intrepid Knight (Empyrean)	Reckoning Dice (Empyrean)
Monad Chamber Bosses
Immortal Gigas and Visceral Maya	Primitive Idol	El Dorado Beast
Brilliant Cyclops	-	-

List of Episode Aigis DLC Bosses

All Story Bosses

Story Bosses
Priestess	Emperor ＆ Empress	Hierophant
Lovers	Chariot ＆ Justice	Hermit
Strength ＆ Fortune	Jin & Takaya	Hanged Man
Chidori Yoshino	Jin Shirato	Takaya Sakaki
Nyx Avatar

List of All Story Bosses

All Guardian Bosses

Tartarus Guardians
Ruthless Ice Raven	Barbaric Beast Wheel	Swift Axle
Will O Wisp Raven	Disturbing Dice	Clairvoyant Relic
Servant Tower	Lascivious Lady	Fleetfooted Cavalry
Ochlocratic Sand	Heretic Magus	Arcanist Decapitator
Tome of Atrophy ＆ Deviant Convict	Controlling Partner ＆ Dependent Partner	Venomous Magus
Bloody Maria ＆ Executioner's Crown	Imposing Skyscraper	Rampaging Sand ＆ Heartless Relic
Raging Turret	Terminal Table	Jotun of Authority
Isolated Castle	Pagoda of Disaster	Dancing Beast Wheel
Demented Knight	Cruel Greatsword	Invigorated Gigas
Cultist of the Storm	Merciless Judge ＆ Executive Greatsword	Chaos Panzer
Icebreaker Lion ＆ Luckless Cupid	Blazing Middle Sibling, Deadly Eldest Sibling ＆ Voltaic Youngest Sibling	Scornful Dice
Minotaur Nulla	Obsessive Sand	-

List of All Guardian Bosses

All Superbosses

Superbosses
Reaper	Elizabeth

List of All Superbosses

All Monad Bosses

Monad Passage Bosses
Cowardly Maya	Rampage Drive, Shouting Tiara and Magical Magus	Bronze Dice ＆ Muttering Tiara
Iron Dice ＆ Silent Book	Platinum Dice, Muttering Tiara and Silent Book	Dogmatic Tower
Natural Dancer	Vehement Idol	Minotaur II
Haunted Castle ＆ Spiritual Castle	Intrepid Knight ＆ Change Relic	Devious Maya and Amorous Snake
Heat, Sky, Light, and Omnipotent Balance	Phantom Master and Morbid Book	Hallowed Turret
Musha Squad	Shadow of the Void	-
Monad Door Bosses
Elegant Mother	Phantom Mage	Red Sigil
Nemean Beast	Eternal Eagle	Chaos Cyclops
Judgment Sword	Minotaur III	Grand Magus
Crazy Twins	Emperor Beetle	Death Castle
Void Giant	World Balance	Eternal Sand
Rampage Drive	Phantom King	Fanatic Tower
White, Black, Pink, Silver, and Gold Hand	-	-

List of All Monad Bosses