I appreciate the feedback/corrections. That reddit post helped a lot.
1. Herald Spawn Basics
- Every Elite (Champion, Unique, Superunique, Boss) has a 2% chance to spawn a Herald.
- Heralds have 5 tiers: Fright → Dread → Fear → Horror → Terror.
- Higher tiers = higher Sunder odds.
- Tier progression only happens within the same game
session, so short sessions are heavily punished.
2. Expected Heralds per Full Clear
A full clear of all 5 Acts contains ~845 elites.
This yields:
- ~5–25 Heralds per full game, depending on RNG and player count.
- Extra elites (Cows, Fetish Shamans, Defilers) add ~0.4 Heralds on average.
Bottom line:
Full‑game clears are the only way to reliably reach Tier 4–5 Heralds.
3. Sunder Charm Drop Mechanics
Sunders drop from two independent paths:
A. Normal Path (MF‑based)
- Magic Grand Charm → Unique Grand Charm.
- Affects all Herald tiers (1–5).
- MF matters, player count does not.
- Tier 1–3 Sunders come only from this path → extremely rare.
B. Specialized Path (Player‑count‑based)
- Only active for Tier 4–5 Heralds.
- Uses the dedicated Sunder Charm TC.
- Player count matters, MF does not.
- NoDrop is enormous on Players1 (23,899/24,000).
- Cold/Fire are most common; Magic is 10× rarer.
This path is where almost all Sunders come from.
Players Setting | Any Sunder Chance
------------------|-------------------
Players1 | 1 in 150–200
Players3 | 1 in 95–110
Players5 | 1 in 60–70
Players7 | 1 in 50–55
Full Party (8p) | 1 in 26–30
Cold/Fire are the most common.
Black Cleft is the rarest by far.
5. Worldstone Shards — The Hidden Bottleneck
To terrorize the entire game, you need all 5 Shards:
- Western
- Eastern
- Southern
- Deep
- Northern
Shard drop chance per elite:
- Players1: 1 in 462
- Players3: 1 in 231
- Players5: 1 in 154
- Players7: 1 in 116
MF does nothing. Only player count matters.
The real problem: Shard TC assignment
Shard TCs are tied to monster level, not Act.
Most elites in the game (and all TZ elites at high level) use the Act 1 Shard TC, which has weights:
5 : 3 : 2 : 2 : 1
This means:
- Act 1 Shards drop 5× more often than Act 5 Shards.
- Act 3 Shards almost never drop (only from low‑level non‑TZ areas).
- Full‑game terror cycles are bottlenecked by Act 5 Shards.
If you clear 10 full TZ games, you’ll average:
- 28 Act 1 Shards
- 16.8 Act 2 Shards
- 11.2 Act 3 Shards
- 11.2 Act 4 Shards
- 5.6 Act 5 Shards
This imbalance is almost certainly an oversight.
6. What Actually Works (and what doesn’t)
Strategies that barely matter
- Chasing “Drawing ire” messages
- Fetish Shaman double‑dipping
- Split‑farming Tombs
- Short TZ runs
- Resetting games frequently
These give tiny improvements.
The only strategy that respects the math
Terrorize the entire game (Acts 1–5) and clear every elite you can find in long sessions.
- Stay in the same game to climb Herald tiers.
- Use Players5–7 if possible.
- Stack 150–300 MF (Normal Path).
- Coordinate with teammates for full‑party efficiency.
- Expect Sunders to be ~60× rarer than pre‑RotW.
If you’re solo or offline, your first Sunder will take time.
7. Final Thought
The system heavily rewards:
- Long sessions
- High player count
- Full clears
- Tier 4–5 Heralds
And it heavily punishes:
- Short runs
- Low player count
- Resetting
- Relying on Tier 1–3 Heralds
If you want Sunders efficiently, full‑game terror cycles are mandatory
Sourced and compacted from
https://www.reddit.com/r/diablo2/comments/1rjzqtt/how_do_heralds_work_herald_spawn_mechanics_sunder/