Rotten Mushmom Boss Guide — Forgotten Hollow Final Boss

Overview

Rotten Mushmom is the final boss of Forgotten Hollow — a rotting, corrupted reimagining of the classic Mushmom fight.

Level：60

HP：86,400

EXP：852

Weakness：Holy / Fire (resists Poison)

Type：Undead

Regen：864 HP every tick — this is the key mechanic!

Physical Attack：752 damage

Magic Attack：827 damage

Respawn：~1 hour

Requirements

• Recommended Level: 55+ (party), 60+ (experienced party)

• Full party of 6 players strongly recommended

• Stock up on Holy Water and fire-based scrolls/potions

• Do NOT attempt solo without extensive practice

Strategy

The Regen Problem

Rotten Mushmom regenerates 864 HP per tick. Your party's combined DPS must exceed this regen rate, or you will never kill her.

Class Roles

Cleric/Priest：Essential — Heal damages undead, Holy attacks exploit weakness

Fire/Poison Mage：Fire attacks deal bonus damage; avoid Poison (she resists it)

Warrior：Tank and DPS; stack DEF for both physical (752) and magic (827) damage

Bowman/Thief：Consistent DPS to outpace regen

Fight Phases

1. Phase 1: Focus fire immediately — don't let regen outpace your damage

2. Watch for adds: Mushroom spawns during the fight

3. Stay mobile: Both physical and magic attacks hit hard — pure DEF won't save you

4. Burn phase: Use all cooldowns and strongest skills to burst her down

Rewards

• Significant EXP reward

• Rare equipment drops

• Forgotten Hollow completion achievement

Important Notes

• Pure physical defense is NOT enough — her magic attack (827) hits harder than physical (752)

• Bring a mix of HP and MP potions

• Coordinate with your party on when to use burst skills

• This boss may be adjusted by Nexon in future patches (especially the regen mechanic)