I having been running adventure modules from Tales from the Yawning Portal for a single group of 3-6 players (i.e. I have 6 players, but sometimes as few as 3 can attend a session). Part of the reason for me running modules is to minimise necessary preparation time.

We recently finished playing the first adventure, Sunless Citadel, when I asked the players which adventure in the book they would like to do next. Upon seeing the massive awesome-looking map for the Doomvault in Dead in Thay (with 107 rooms, all containing encounters, divided into 9 mini-dungeons), they unanimously voted for that one. I warned them that it would take many sessions to complete, and they were fine with that. So I got all the characters to advance to Level 9, threw them some bonus loot, and dropped them into the Doomvault.

We are now three sessions in, and I have identified a few potential issues.

The lengthy preamble to the adventure says:

The incursion into the Doomvault is intended to be a fast-paced assault in which the characters have little time for typical rests. A few areas of the dungeon offer access to special magic that allows characters to gain the benefit of a rest.

However, our experience so far has been contrary to this. I provide a transcript of the game so far below:

  • In the first session, with 5 players, they fought through 3 rooms occupied by ordinary enemies, then one room occupied by a big (CR 10) boss monster. This took 40 minutes of in-game time.

  • In the second session, with 3 players (all casters), they took a long rest, had one encounter with two-and-a-half rooms' worth of enemies (although a well-placed conjure woodland beings tipped the balance in their favour), then killed another big (CR 10) boss monster. After the rest, this took 1 hour of in-game time.

  • In the third session, with 3 players (2 casters), they took a short rest, killed a relatively strong monster, found a source of healing, fought two gorgons, returned to the gatehouse, twiddled their thumbs and restocked for what I declared to be 9 hours, took a long rest, returned to the dungeon, and fought a small room's worth of enemies.

  • In the fourth session, with 4 players (2.5 casters), they had 3 combat encounters.

  • In the fifth session, with 3 players (2.5 casters), they dealt with a minor trap, had one combat encounter, took a long rest, had one large combat encounter, then took a short rest.

(For those unfamiliar with Dead in Thay, the gatehouse is an unmapped area through which the players entered the Doomvault and is under control of allies to the party. The module assumes that no encounters will happen in the gatehouse. I have thus assumed that it can function as a safe-room.)

So far, we have had 14 encounters, 3 long rests and 2 short rests. Over an in-game time of 49:20, the party has only spent 3:55 inside the dungeon, with the rest of the time sheltering in the gatehouse - far from a fast-paced assault! Typically, the call to take a long rest was done because the casters were out of spell slots, and with small party sizes the casters needed their spell slots for the party to deal enough damage to push through the encounters. While the players have found ways to recover hit-points within the Doomvault, nothing they have lets them recover spell slots besides a long rest.

I do not believe this to be a fault in the party (besides being too small half the time), but rather a characteristic of Dead in Thay. Page 84 of the DMG talks of the Adventuring Day, which is how many encounters a party can have between two long rests. For three level 9 PCs, an adventuring day contains 22,500 XP worth of encounters. Between the first two long rests, my three level 9 PCs had 31,900 XP worth of encounters, so it is hardly surprising that the party's resources are so taxed. Between the second two long rests, we had 29,050 XP of encounters, mostly for 4 PCs, 2 lvl 9 and 2 lvl 10, which is around the right amount for an adventuring day.

If I had all 6 of my players, they could probably get further, but their adventuring day would still be much, much shorter than a full day. And because of this, and how a character can only benefit from a long rest once every 24 hours (PHB 186) (a rule I have already stretched a little), I anticipate that this will result in many more periods of inactivity in the gatehouse.

I am aware that the Thayans of the Doomvault can and will run some degree of preparations and repairs while the party is resting. However, the highly segregated nature of the Doomvault leads me to think that damage dealt to one section won't draw that much attention from another section unless it is utterly catastrophic. And since access into and out of the Doomvault is being tightly controlled against the Thayans, their ability to replenish lost monsters is limited. The modifications the Thayans could make to the Doomvault during rests would be highly situational and rather limited, as far as I can tell, although maybe I'm just unimaginative.

Further reading about Dead in Thay online indicates that the adventure was originally designed for many groups of players to tackle simultaneously. This makes me fear that the Doomvault will become a long grind rather than a fast-paced assault for a single party.

On a related point, Dead in Thay includes a feature called 'Alert Level' which increases the difficulty of random encounters the longer players spend in the Doomvault; a feature intended to add to the feeling of a 'fast-paced assault'. However, if the players only spend 2 hours a day inside the Doomvault, then the Alert Level never goes up by the rules as written, which is boring. I am considering having time spent in the gatehouse not decrease the Alert Level (but not increase it either), or possibly make Alert Level increase faster (1 per hour rather than 1 per 4 hours).

My question is this:
For a single party, how can I make Dead in Thay a "fast-paced assault" and not a drawn-out series of skirmishes?

Specifically, I would like to know how to

  • avoid the "15-minute working day" in a module densely packed with encounters (I am aware of several questions which handle this question generically; advice specific to Dead in Thay is thus preferable),
  • avoid burn-out in this mega-dungeon, and
  • make the Alert Level meaningful (although this is a minor point compared to the above two),

preferably without having to re-write the module.

An answer should preferably include your own experience in running Dead in Thay and how you tackled these issues (or if they are issues at all), although experience from other adventure modules of similar scale and density is acceptable.


First - this answer is based on the original D&D Next module for tournament play, designed for 1-4 teams of 4-6 players each. I am hoping this will inspire someone with the 5e version to jump in with a better-educated answer.

The first issue is that there was a key option in the original module to speed up the pace of the assault (is this still in the updated version?):

Syranna gives the characters a glyph key and information on how to access the Seclusion Crypt. Time passes within this demiplane but no time passes in the world. This allows the party to rest without "real world" time passing. There is a drawback to this, which requires either an occasional long rest outside of the Seclusion Crypt or the use of Remove Curse. Edit: The characters age one month for every hour they spend in the Seclusion Crypt. This aging catches up with characters as soon as they leave the demiplane. Each time after the first that a character uses the crypt, that characters maximum hit point total drops by 5 until the character completes a long rest outside the crypt. A Remove Curse spell can end these effects. Note that the original module was for level 6-8 characters, where Remove Curse would be more of an imposition and a 5 hitpoint reduction would have more of an impact.

The second issue is that while you have recognised that your party is understrength, the effects of this are frequently non-linear. You might intuitively expect that a 6 character party would get through twice as many encounters of a given strength as a 3 character party before needing to rest. In fact it is more likely to be a four-fold increase in encounters between rests because of the impact on the enemy's action economy.

Let's say that a 3 character party takes 4 rounds to defeat an enemy. Between them they have used 12 rounds worth of actions (attacks, spells etc). After combat is over, they need to use resources to heal 4 rounds worth of the enemy's attacks.

Now let's say that a 6 character party attacks the same enemy. It still takes 12 rounds worth of actions to defeat the enemy, but they can dish this out in only 2 rounds. Therefore, in post-combat healing the party only need to heal 2 rounds worth of the enemy's attacks. This is not even taking into account the increased options that a larger group of characters have to control the battlefield and restrict the enemy's options in the rounds before their demise.

The impact of trying to run a very large module designed for 4-6 characters with only 3 (in practice) is likely to be a much more draining experience, especially with a spell-slot-dependent group.

Options to remedy this include:

  • If there are some sessions that you will be able to get the entire group of 6 players together then push the party towards the combat-heavy encounters in these sessions.
  • Add NPC supporters accompanying the party. There are some areas with NPC prisoners and other options for allies. If necessary, redesign slightly to give the PCs some options (scrolls?) for dominating caged monsters and using them as cannon fodder.
  • Encourage the PCs towards areas with encounters that can be resolved entirely or in part with roleplaying rather than combat when they are understrength.

Finally, the Alert Level rules you are describing are completely different to the rules in the earlier version so I shall not attempt to comment on these.

  • \$\begingroup\$ Cheers for the answer. The Tales from the Yawning Portal version of Dead in Thay does not include the Seclusion Crypt. It may have been helpful; I might find a way to incorporate something similar if I can get it in naturally, although it doesn't fix the 15-minute working day. Your advice for handling a small group will likely help. \$\endgroup\$ – BBeast Sep 30 '18 at 11:03
  • \$\begingroup\$ Could you specify/summarise the 'drawback' the Seclusion Crypt had? It may help inspire me. \$\endgroup\$ – BBeast Sep 30 '18 at 11:21
  • \$\begingroup\$ @BBeast have updated the spoiler section with details. Good luck with the adventure. \$\endgroup\$ – KerrAvon2055 Sep 30 '18 at 11:52

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