The Stygian Stone is one of the most coveted endgame crafting and summoning materials in Diablo IV, especially during Season 7: Season of the Witchcraft. Whether you're looking to summon the game’s most dangerous Tormented Bosses, chase Mythic Uniques, or push high-tier endgame loot farming, you’ll need a steady supply of these rare stones. However, acquiring Stygian Stones can be confusing for new players and veterans alike due to the layered mechanics of Whispers of the Dead, Infernal Hordes, and Helltide activities.This guide will break down everything you need to know about how to get the Stygian Stone in Diablo IV, including:

What is a Stygian Stone?

All known methods to acquire it in Season 7

Farming strategies and drop rates

Best activities to prioritize

Stygian Stone usage and boss summoning

Tips to farm efficiently solo or in a group

What is a Stygian Stone?

The Stygian Stone is a rare consumable item used to summon Tormented Echoes—the more powerful versions of Diablo IV’s major endgame bosses like Grigoire, Varshan, Andariel, and Duriel. These bosses drop high-value loot, including:

Mythic Unique Items (Season 7)

High-Roll Uniques and Uber Uniques

Materials for crafting endgame gear

Cosmetic rewards and mounts (rare)

You cannot summon Tormented Echoes without a Stygian Stone—this makes them a core currency for min-maxing high-tier builds and loot hunting.

How to Get the Stygian Stone in Diablo IV

Stygian Stones are not common drops like Forgotten Souls or Murmuring Obols. They can only be acquired through specific high-difficulty activities, mainly:

1. Infernal Hordes (Season 7)

This is the primary method to acquire Stygian Stones in Season 7. Infernal Hordes is an activity unlocked after reaching World Tier IV and progressing through the Season of the Witchcraft storyline.

How It Works:

After collecting enough Hellflame Shards, players can activate a Hellborne Beacon to enter the Infernal Hordes mode.

In this mode, you fight through waves of elite enemies under time pressure.

At the end, you face an Infernal Boss, like a Hellborne Lieutenant or Commander.

If you survive and defeat the final boss, Stygian Stones have a chance to drop, especially if you select Tormented difficulty modifiers (like +Boss Difficulty, +Enemy HP, +Corruption).

Drop Rate:

On normal difficulty: ~5–10% chance per run.

On Tormented difficulty (with modifiers enabled): up to 25% chance, and you may receive multiple stones if lucky.

Pro Tip:

Equip loot-boosting Elixirs and participate in Whisper events while doing Infernal Hordes for bonus XP and rewards.

2. Whispers of the Dead – Grim Favors

You can earn Stygian Stones as part of the Grim Favor Cache loot when you turn in 10 Grim Favors to the Tree of Whispers. This method is less consistent than Infernal Hordes but still viable.

Key Details:

Only T3 and T4 Grim Favor Caches can contain Stygian Stones.

The chance to get one increases if you select Caches labeled as:

“Mystery Cache”

“Nightmare Dungeon Cache”

“Boss Cache”

This method works well if you're already grinding Whispers for currency, XP, or Nightmare Sigils.

3. Helltide Events (T4 Only)

Helltides are an open-world PvE event where monsters drop Aberrant Cinders, and new enemy types spawn. In T4 Helltides, there's a small chance to find Stygian Stones:

From Helltide Mystery Chests (250 Cinders)

From elite enemies near Accursed Rituals

As rare drops from Tortured Gifts (especially Weapon/Armor/Helmet chests)

The drop rate is very low—around 2–3%—so this is not the most efficient method unless you're already farming Forgotten Souls or materials.

4. World Bosses (Tormented Variant)

In World Tier 4, the Tormented World Bosses (e.g., Tormented Ashava, Tormented Avarice) drop Stygian Stones with a low to moderate chance (5–15%) upon defeat.

You must use a Stygian Stone to summon a Tormented version via the Occultist, so this method becomes a loop: fight a Tormented Boss to potentially get more Stygian Stones.

How to Farm Stygian Stones Efficiently

Here are the best strategies for farming Stygian Stones efficiently in Season 7:

A. Run Infernal Hordes with High Corruption

Use modifiers that increase boss difficulty and corruption gain.

Aim to defeat all waves to reach the Tormented final boss.

Play in a 4-player group for faster clears and increased loot chances.

B. Cycle Between Whispers and Hordes

Complete Whispers to earn Hellflame Shards.

While farming Whispers, collect Grim Favors to turn in for extra Cache rewards.

This approach provides steady XP, materials, and a chance at Stygian Stones from both ends.

C. Prioritize High-Difficulty Events

The higher the challenge, the better the drop rate.

Use World Tier IV, and increase dungeon difficulty when possible.

How to Use the Stygian Stone

To summon a Tormented Echo, follow these steps:

Collect the required summoning materials, usually including:

Stygian Stone (x1)

Boss-specific materials (e.g., Living Steel for Grigoire)

Scattered Prisms / Forgotten Souls

Visit the Occultist’s Crafting Tab and navigate to the Boss Summoning section.

Choose the Tormented Echo version of the boss you want.

Use the materials to summon the boss via:

Tree of Whispers altar

Endgame Boss Arenas unlocked through the seasonal questline

Note: These bosses are extremely difficult and intended for well-geared Level 100 characters.

Tips for Farming in Groups

Coordinate builds: A high DPS, tank, and support healer/CC build combo works best in Infernal Hordes.

Voice chat or pings: Communicate modifiers and strategy between each wave.

Rotate rewards: If one player gets a Stygian Stone, plan to pool materials for next summon.

Final Thoughts

The Stygian Stone is a high-tier item that fuels Diablo IV’s endgame loop in Season 7. Whether you're hunting Mythic Uniques, maximizing loot drops, or challenging Tormented Bosses, these stones are your key to high-risk, high-reward gameplay. While RNG is always part of the process, focusing your grind on Infernal Hordes, T4 Whispers, D4 materials and Tormented Bosses will give you the best shot at stacking up Stygian Stones consistently.

With the right strategy—and maybe a few brave allies—you’ll soon have enough Stygian Stones to summon the deadliest Echoes in Sanctuary and claim the most powerful loot in the game.