Alluvion waits at the lowest point of the Water Shrine during Chapter 3 of Final Fantasy Resonance, “Wardens of the Aquapolis”, while you pursue “Go deeper into the Water Shrine”. Its signature move is Graceful Deluge, but you can prevent it from going off. Our party of Rain, Lid, Lasswell and Archwitch Fina fought it at Lv. 23, three levels below the Water Shrine door’s recommended Lv. 26. Nichol is also present as a guest combatant and takes his turns independently.
Quick answer: Remove both Prism Cores before Alluvion reaches its marked move; Graceful Deluge is then canceled with “Tch…not enough power…” Focus Thunder and Siren on the cores, and use every stagger opening for Limit Bursts and Crystal Braver.
Alluvion is a Lv. 26 Humanoid with 48,000 HP. It is weak to Thunder and nullifies Water. The battle takes place on B2, the shrine’s lowest level, just past the boss save point. Graceful Deluge is the attack that wipes parties, and the Prism Cores supply its power.
| Stat |  Alluvion |  Prism Core |
|---|---|---|
| Level | Lv. 26 | Lv. 26 |
| HP | 48,000 | 4,000 |
| Type | Humanoid | Fairy |
| Weak to | Thunder | Thunder |
| Nullifies | Water | – |
| Trait | “Power of special skill increases with each prism core.” | – |
| Items dropped | Azure Amulet | – |
| Rare drop / steal | – | – |
| Reward (listed) | 6,300 EXP, 7,500 Gil | – |
Every row except the reward comes from Libra in battle.
Where to fight Alluvion and the boss save point
The way down opens once all three seal pedestals are done, in Area 3, Area 4, and Area 2. Head back to Area 1 and ride the octagonal lift with four blue lamps down to B2. The Water Shrine walkthrough covers the full route to that point.
The lift drops you beside the B2 save point.
From its menu, you can save progress, rest in a tent, or teleport. This is the final save point before the boss, so restore your party and save.
Go through the north arch past the save point and the boss scene starts automatically. A story scene with El plays, and the battle follows straight after with no way to back out. As the fight opens, Nichol says, “Alluvion… You will never be forgiven for your transgressions.” He then joins as a guest and takes his own turns.
Alluvion’s Libra stats, weakness and the Azure Amulet
Libra on Alluvion shows Lv. 26, HP 48,000, Type Humanoid, weak to Thunder, and Water nullified. Its Trait 1 reads “Power of special skill increases with each prism core.” Under Items Dropped it lists the Azure Amulet. There is no rare drop and nothing to steal. Alluvion sits on the bosses list with the rest of the game’s boss fights.
Winning gives you the Azure Amulet. The Battle Result screen lists “Azure Amulet x1” under Items Obtained. The description reads “Imbues non-elemental physical attacks with Water.” and the amulet sells for 8,750 Gil. It also appears on the accessories list.
Avoid Water attacks here because they have no effect on Alluvion. Status effects are mostly useless on the boss:
- No effect: Poison, Sleep, Confuse, Petrify, Charm, Berserk, Death, Gravity
- Strongly resisted: Blind, Silence, Paralysis
How the Prism Cores and Graceful Deluge work
The opening banner reads “Prism cores formed!”, and two cores, A and B, appear.
Libra gives each core’s details as Lv. 26, 4,000 HP, Type Fairy, and a weakness to Thunder. Each core has its own place on the turn order bar and casts Ruin at one party member, dealing about 600 damage.
Watch Alluvion’s own icon on the turn order bar. Before the absorb turn, it gets a yellow “!” with a red glow.
If any core is still alive on that turn, Alluvion says “Take this!”, the banner “Prism cores absorbed!” appears, and the cores disappear.
Alluvion then casts Graceful Deluge on the whole party, hitting each member for roughly 300 to 800.
After that, “Prism cores formed!” shows up again with a new pair. They go C and D, then E and F, and so on, roughly every two rounds. Alluvion’s trait ties the special skill’s strength to each prism core.
Alluvion strategy: destroy both Prism Cores before the marked turn
With both gone, Alluvion says “Tch…not enough power…” and Graceful Deluge never happens. The party takes no damage from it.
With the full party up it offers Hibernal Fury, Healing Wind, and Crystal Braver, so pick Crystal Braver for damage. With only two members standing, the Resonance wheel offers only Healing Wind.
Selecting Retry brings up “Retry this battle from the beginning?” with No selected. Move to Yes to restart using the HP, MP, and items you had at the battle’s start. The long scene is skipped, and only the opening battle dialogue plays again. See the guide to escaping battle and what Retry does for more details.
Alluvion’s other attacks
| Attack | What it does |
|---|---|
| Drain | Whole party, about 550 to 690 each |
| Gravity | Halves one member’s HP |
| Water | Whole party, about 550 to 700 each |
| Ruin | Single target, about 600 (cores cast it too) |
| The Divine Signet | Special skill with its own banner |
| Charm | Charmed Archwitch Fina |
| Berserk | Berserked Lid |
Drain lands on everyone at once, so it stacks quickly with core Ruin.
Gravity cuts a target’s current HP in half, taking Archwitch Fina from 1,067 to 534.
The Divine Signet is a special skill that gets its own banner when Alluvion uses it.
Two accessories answer these attacks directly. The Calm Armlet from Area 2 of the Water Shrine reads “Prevents Confuse and Berserk.” The Aquatic Veil from Waterfall Way reads “Halves damage taken from Water attacks.” Both are worth equipping for this fight.
What to expect at level 23
At Lv. 23, three levels under the recommendation, damage on Alluvion stays low.
| Action | Result |
|---|---|
| Rain’s Thundara (single target) | “Weak +350%”, about 237 to 251 |
| Thundara on all targets (Q) | Weak on Alluvion and both cores, about 96 each |
| Lightning Scroll I | “Weak +200%” |
| Lid’s Attack | About 174 |
| Archwitch Fina’s Cura | Heals whole party for about 290 |
| Rain’s Infinity Drive (Bonus Phase) | About 880 |
| Siren’s Aero | About 1,850 total over Alluvion and both cores |
At this level, healing runs out before Alluvion does. After about 60 turns, Alluvion can still hold roughly 72% of its HP.
The core trick keeps the party alive, but the fight stays long and draining. Arrive close to Lv. 26 and stock up on Mist Potions, Ethers, and Phoenix Downs.
After the fight
Defeating Alluvion triggers an extended story scene. After it finishes, your quest changes to “Go to Olderion, the aquapolis”, an autosave occurs, and you return to B2 next to the save point. Continue with the Final Fantasy Resonance walkthrough from there.
Alluvion fight summary
- Take out both Prism Cores before Alluvion’s marked action to stop Graceful Deluge.
- Alluvion and the cores are weak to Thunder, and Alluvion nullifies Water.
- Siren’s Aero strikes Alluvion along with both cores.
- Each Prism Core has 4,000 HP.
- Spend staggers on Limit Bursts and Crystal Braver.
- The drop is the Azure Amulet.
