What act and difficulty is 3-9 Core of the Abyss?

3-9 Core of the Abyss is Act 3 on Nightmare difficulty. The full 120-stage campaign is broken into 3 acts times 10 stages times 4 difficulties.

What level should my heroes be for 3-9 Core of the Abyss?

3-9 Core of the Abyss has a recommended level of Lv 52. Heroes below this level will underperform; heroes well above it will clear the stage trivially.

What materials drop from 3-9 Core of the Abyss?

The "What to farm here" panel on this page lists every material whose rarity band brackets this stage's level. The Drop Finder is the inverse tool — pick a material and see which stages to clear.

Stagecommonv1.00.26

3-9 Core of the Abyss

Act 3 / Nightmare

Act 3 Nightmare stage 3-9 Core of the Abyss. Recommended hero level Lv 52. Mini-boss: Mummy.

Key attributes

Stage ID: 2309
Difficulty: Nightmare
Act: 3
Stage in Act: 3-9
Recommended Level: Lv 52
Difficulty Level Range: Lv 33–52
Boss: Mummy
Waves: 23
Kills: 345
Gold: 1,029,458
EXP: 19,768,579
Unlocks Max Item Level: Lv 52

Notes

3-9 Core of the Abyss sits in Act 3 of the Nightmare run at recommended hero level Lv 52. The stage runs 23 wave(s) with 345 kills and rewards 1,029,458 gold and 19,768,579 experience. Reaching this stage unlocks item level Lv 52 in the drop pool; rarity does not scale by area, so even 3-9 can drop an Immortal. The mini-boss is Mummy.

3-9 Core of the Abyss Farming & Progression Guide

With a recommended level around Lv 52 and guarded by Mummy, this stage is an ideal benchmark for your team's idle DPS. If your taskbar heroes take more than 20 seconds to clear a wave here, consider stepping back to an earlier stage to optimize gold-per-minute farming.