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Neverness to Everness · Weekly Fons Anomaly · New Herland

Yarn Ball or Fons? — Mammon

A money fight. Visit Director Date in the Gold Apple Collection Hall, descend the spiral staircase and golden elevator to B1, and burn down Mammon before the timer expires. Win and the Fons reward unlocks weekly; let the clock run out and you walk away with nothing.

Overview

Commission nameYarn Ball or Fons?
BossMammon
RegionNew Herland — Gold Apple Collection Hall, east of ReroRero Phone Booth
Difficulty★★★★☆ Level IV
WeaknessLakshana
Time limitYes — kill Mammon before the timer expires or lose the Fons reward
CadenceWeekly lockout — rewards reset every Monday
Arc rewardNone — pure Fons farm anomaly (no Arc, no signature drop)

TL;DR — 5 Steps

  1. Teleport to ReroRero Phone BoothNew Herland District. Face east and you'll see the Gold Apple Collection Hall building dominating the skyline.
  2. Talk to Director DateHe stands in front of a closed door to the right of the staircase inside the hall. After dialogue, the door beside him opens.
  3. Descend the corridor and spiral staircaseThe corridor leads underground to a chamber with a tall central statue ringed by a spiral staircase. Walk down to the statue's base.
  4. Take the golden elevator to B1Turn around at the base of the statue — the elevator is right behind you. Call it, enter, hit the B1 panel button.
  5. Kill Mammon under the timerBring Lakshana damage and a quick burst comp. Letting the timer run out forfeits the Fons; the fight is balanced around fast clears.

Reaching the Mammon Arena

  1. Open the world map and fast-travel to the ReroRero Phone Booth in New Herland District.
  2. Exit the booth and turn east — the Gold Apple Collection Hall is the large building dominating that direction.
  3. Enter the hall through the main entrance and approach the staircase in the lobby.
  4. Look to the right of the staircase — Director Date stands in front of a closed door. Initiate dialogue.
  5. When the conversation ends, the door to his right unlocks. Walk through it.
  6. The corridor descends into a large underground chamber with a tall statue at its centre and a spiral staircase wrapping around it.
  7. Walk down the spiral staircase until you reach the base of the statue.
  8. Turn 180° — a golden elevator faces you. Interact with the call panel beside it.
  9. Enter the elevator, interact with the number panel inside, select B1.
  10. Exit on B1 and follow the corridor — Mammon's arena is at the end.

Boss: Mammon

A money-themed anomaly entity built around fast, agile attack strings and a strict damage check. The fight has a visible timer at the top of the screen — let it expire and you walk out empty-handed regardless of how much HP you shaved off. Plan a burst comp, learn the parry windows on his finishers, and don't waste seconds on greed.

Quick attack strings

Dodge

Tell: Red glints flash on his hands or weapon a fraction of a second before each hit in the string.

The strings can run 4-6 hits long. Don't try to dodge each individual hit — count them, dodge through the cluster, and look for the parry opportunity at the end.

Parryable finishers

Parry

Tell: A red warning circle telegraphs the finisher swing rather than a glint.

Parrying knocks Mammon off-balance and opens a clean burst window. Single biggest source of free damage in the fight.

Array slam (delayed AoE)

Dodge twice

Tell: Multiple swipes, then a fist slam. Floor glow appears at the slam's impact.

Critical pattern. The string does NOT end on the slam — the delayed AoE comes a beat later from the glow. Most deaths in this fight come from assuming the string is over and standing too close.

Recommended Teams

Charge team (Nanally main)

Remora + Blossom Esper Cycles · Charge fills Ultimate energy fast

  • NanallyNanallyMain DPS · Anima
  • HathorHathorSub-DPS · Lakshana
  • ZeroZeroSub-DPS · Cosmos
  • EdgarEdgarSupport · Cosmos

Nanally delivers the damage check, Hathor hits the Lakshana weakness, Zero + Edgar keep the Esper Cycle and Ultimate energy flowing. Best fit if you already meta-built Nanally.

Stain team (Hathor main)

Lakshana × Psyche stacks for raw weakness damage

  • HathorHathorMain DPS · Lakshana
  • SkiaSkiaSub-DPS · Cosmos
  • AureliaAureliaSub-DPS · Psyche
  • FadiaFadiaSub-DPS · Psyche

Hathor on-element + the Stain reaction stacked from Psyche profiles. Skia or Fadia rotates in for Support Skill triggers; Aurelia carries the survivability.

Rewards

Fons (variable)Pays out only if Mammon is killed before the timer — the timer is the entire reward gate
Hunter EXPCommission payout
AnnulithCommission payout
Beetle CoinCommission payout
Weekly lockoutResets every Monday — one main payout per week

Pro Tips & Common Pitfalls

  • Treat Yarn Ball or Fons as a weekly Fons faucet, not a regular farm. The Monday reset makes it a guaranteed weekly task on your Realm of Mammon / Fons routine.
  • Don't enter under-levelled. The timer is unforgiving — even a perfectly executed fight on an under-geared team will fall short of the kill threshold.
  • Refuse to dodge the Array Slam early. The delayed AoE is the #1 killer here. Wait for the floor glow to flash, THEN dodge — your iframes need to land during the second pulse, not the first.
  • Parries on the red-circle finishers stagger Mammon. Skip your basic-attack chain immediately after a parry and go straight into Ultimate / burst — staggers are the only generous window in the fight.
  • If you fail the timer once, learn the pattern on that attempt and don't burn the weekly retry. The encounter does not lock you out after a fail, but every retry that ends short of the timer is wasted minutes.
  • Pairs naturally with the Fons farming guide — see the Fons guide for the full economy routine of which Yarn Ball or Fons is one piece.
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