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D7 Obsidian Mines Strategy: Squad Composition & Darkness Management

Player question: What is the recommended team composition and strategy to clear and farm D7 Obsidian Mines in Idle Guild Master?

I like these games and play them myself. Complete guides are hard to find online, so while playing I collect community experience from Reddit, add a little of my own notes, and put this site together—hoping it helps. Thank you.

Quick answer

Recommendation Clearing D7 (Obsidian Mines) requires mitigating heavy environmental darkness and surviving high burst damage from obsidian golems. The standard 4-hero squad runs a high-threat Royal Guard (Titan) with the Brute trait, an Alert Archangel / Healer, an offensive caster (Fire Elder or Lich with status immunity), and 1–2 Shadow Rogues or Marksmen. Bring a Bright Construct pet or heroes with the Blessed secondary trait to reduce the darkness miss penalty below critical thresholds.

D7 Environmental Hazards: Darkness & Golems

Observed Game Fact Unlocking D7 requires clearing Wave 100 of D6 (The Sunken City). In D7 (Obsidian Mines), players encounter deep environmental darkness and armored obsidian foes that inflict heavy physical crushing attacks. If environmental darkness is unaddressed, heroes suffer up to a 40% accuracy penalty, leading to missed attacks and interrupted combo loops.

Community Knowledge Following common hurdles in D6[1], players entering D7 often suffer sudden party wipes between waves 40 and 70 due to darkness-induced misses failing to trigger tank lifesteal or crowd control[2].

Recommended Squad Composition

Community testing on r/IdleGuildMaster emphasizes a balanced 4-man setup capable of sustaining prolonged crawls[3]:

SlotArchetypeTrait SetupCore Gear & Role
Frontline TankRoyal Guard (Titan)Brute + Intimidating / Dragon BloodHeavy plate armor, tower shield. Anchors threat and absorbs golem crushing blows.
Primary HealerArchangel / White MageAlert + EmpatheticSnake Staff or healing wand. Alert ensures healing triggers before incoming enemy volleys.
Burst DPSFire Elder / Inferno MageBookworm + FocusedStaff of conflagration. Clears multi-target swarm waves before golem reinforcements arrive.
Physical CarryShadow Rogue / Night TerrorFeral + NocturnalDual daggers. Nocturnal scales damage directly from the high darkness level of D7.

Darkness Mitigation & Pet Selection

Shadow Ring Farming & Wave 100 Gate

Recommendation Once you clear Wave 100 and unlock D8, D7 transitions into a specialized resource zone for harvesting Shadow Rings and T7 crafting minerals. Running a Rogue-stacked composition with Nocturnal passives allows high-speed clears of waves 1–80 with minimal downtime.

Version-sensitive Encounter damage scaling in live builds means that if your tank falls below 450 HP, golem critical strikes can trigger immediate one-shots. Ensure iron helmets and plate chest pieces are upgraded before attempting automated overnight farming.

← Back to Guild Master - Idle Dungeons Hub · Related: Balrog Build & Doctrine · Tank Leveling Doctrines

Sources & claim classes

  1. How to get pass d6 （将打开 Reddit） — Progression gating, squad tier checks, and transition into D7.
  2. Team for d7/obsidian mine （将打开 Reddit） — Community squad compositions and trait combinations for handling Obsidian Mines darkness.
  3. My strategy for defeating D7 （将打开 Reddit） — Detailed player walkthrough on mitigating crushing damage, pet utility, and wave 100 clears.

Evidence via Evidence Job consumer pointer under research/pipeline/jobs/idle-guild-master/. Classes used: Observed Game Fact, Community Knowledge, Recommendation, Version-sensitive.