Chainmail magic: Spell Complexity, Counter spell, and more oddities

Chainmail* has several interesting ideas that have been "lost" in the transition to D&D. Studying them is fun and can provide many ideas for your D&Dish games. Today, we tackle magic, in three parts: Spell Complexity, Counter spell, and other curiosities.

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Spell Complexity

Spell Complexity is an optional rule where "each listed spell has a complexity value, and this value indicates how difficult it is to use such spell. [...] In addition, there may be a delay in the effect of the spell, or it may be totally negated due to some minor error or distraction. The table below gives the scores necessary for immediate, deferred (1 turn), and negated spell effects by the various levels of magic-users.".

In other words:

- Roll 2d6. Subtract spell level. Add half your level, round up (this is an approximation, CM units have names instead of levels).

- 8 or more means the spell is cast immediately. 6-7 means it is delayed for one turn. 5 means the spell fails. 

While I have written my own roll-to-cast rule for B/X, I must admit I'm enthralled by this one, simply because of the spell delay aspect. It adds another layer of excitement/tension and choice/tactics to everyone on the battlefield.

Now spell interruption is not only about initiative, but about a series of choices on both sides of the battle.

BTW, the book won't tell you what happens if you roll lower than 5; I first assumed the spell is lost for the day, but it could also be a spell mishap, etc. Look at the post I mentioned for more ideas. But, as mentioned in the comments, the table probably indicates that 5 or less means the spell fails. The notation is horrible but supposedly it is common in wargaming at the time.

Counter spell

"The stronger magician can successfully cast a counter-spell with a two dice score of 7 or better, while a weaker magician needs a score of 8, 9, 10 or 11, depending on his relative strength. A counter-spell fully occupies a magician's powers." 

In other words... you could employ a similar dice roll as the one describe above, adding your level and subtracting your opponent's level (half-level would be more precise, but I'd favor simplicity here).

CM does not delve into further detail; I assume the spell that is successfully countered is negated. I'm unsure if only delayed spells can be countered, but it would be fun if your delay allowed another magician to not only counter your spell but also cast a spell against you, etc.

Again, this adds another layer of tension and tactics to the game.

Other curiosities

"Wizards can handle magical weaponry. [...] Wizards can become invisible and remain so until they attack, they con see in darkness, they affect friendly and enemy morale as do Super Heroes [...]. Wizards are themselves impervious to normal missile fire but if they are struck by a missile from an enemy Wizard they must score 7 or better with two to survive."

They seems very powerful!

Wizards are also artillery. They can throw fireballs and lightning bolts (with effects similar to guns and catapults), which are not spells, so presumably they don't "roll to cast" and never run out. I like this approach and I added an "arcane artillery" feat to my Old School Feats.

A wizard - the highest level a magic-user can get - has only 6-7 spells. If we count fireballs, lighting bolts, and in visibility, we are not very far from one spell per level, which I like.

Also notice the lack of "Vancian" casting. No memorization. You just have a few spells that you can cast over and over until you fail.

Overall, I really like Chainmail magic. It is somewhat simpler and at the same time has more tactical depth than B/X, without getting to AD&D levels of complexity.

It doesn't require memorization, material components or specific casting times; the spells can be cast more often, but also can be delayed and countered. This seems to me as a superior alternative as it is more exciting than a list of requirements.

A B/X conversion?

How about 10+ means immediate casting, 5+ means delayed casting, and less than that you fail or lose the spell? This makes MUs lose some of their speed but not their power. Seems good for starting MUs, but as always they become too powerful at higher levels. As always, some fine-tuning is needed.

Black Amazon of Mars by Leigh Brackett (short review)

Grimly Eric John Stark slogged toward that ancient Martian city-with every step he cursed the talisman of Ban Cruach that flamed in his blood-stained belt. Behind him screamed the hordes of Ciaran, hungering for that magic jewel-ahead lay the dread abode of the Ice Creatures-at his side stalked the whispering spectre of Ban Cruach, urging him on to a battle Stark knew he must lose!

- (From the blurb on Amazon)

This was another read in my Appendix N quest. It is a short story and will get a short review.

The book is strongly reminiscent of Edgar Rice Burroughs’ A Princess of Mars, and also Robert E. Howard’s Conan. The Mars setting feels more like Hyboria than Barsoom—not just because of the Celtic/Gaelic-sounding names, but also because there’s little that feels distinctly alien (not many spaceships or ray guns here). Even the most sinister creatures resemble ghosts more than extraterrestrials.

The story isn’t nearly as imaginative as Burroughs’ Barsoom, nor as gritty as Conan, or as weird as The Shadow People. In that sense, the book was a bit of a disappointment.

However, it’s still a fun read. Brackett’s prose is leaner and faster than Burroughs or Howard, maintaining a pace of nonstop action that never lets you get bored. The alien villains have compelling motives and backstories, and while the setting is somewhat sparse, it still has its cool moments (and can provide some inspiration for your D&D games, especially if you like Dark Sun). The main character is a bit underdeveloped, but the supporting cast shows more personality than most pulp coadjutants.

To me, Burroughs + Howard + Lovecraft/Merrit monsters sounds like a winning formula, and Brackett’s action-driven style could have made this a standout. But in the end, it felt a bit derivative and predictable. Then again, it’s a short book—which explains both its strengths (tight pacing) and its weaknesses (underdeveloped elements).

Overall, it’s worth the read—especially if you enjoy pulp, sword and planet, Burroughs or Howard. Maybe I'll look further into her work in the future.

B/X random encounter/travel generator

So I've made a small dice roller / random encounter/ travel generator for B/X, OSE and other "Basic" games.

Here you go.

This is a tool I wanted to have for my own games; I realized it takes too long to roll during the game. Now I can do most of the work with a click (or a few clicks; see below).

I've tried several solutions, including rolling 1000 (!) encounters for my games, many of which I used with great success - they are in the Basic Wilderness Encounters book.

But I also wanted an automated tool for weather (I often forget to roll/describe it) and encounter checks. The weather checks are just descriptive unless they roll terrible weather. I created them inspired by the reaction table.

This isn't as complete as Basic Wilderness Encounters (which also includes NPC names, number and type of monsters appearing, etc.). It is more agnostic, however; you can combine it with your favorite random encounter table, table of random names, etc.

Here are some fine tools for OSE. I've seen some other tools out there in the format of apps and spreadsheets, but I prefer having one link, that I can "roll" with one click.

And it is very transparent, you can ignore any roll you want, add Charisma to the reaction check, let PCs roll for surprise, etc.

I might fix some stuff if I had similar tools formatted for perchance. I especially wish I had a generator that also gave me the number appearing immediately; the rest is often not as important, because the PCs can sometimes choose to ignore the encounter, for example.

I hope this tool helps you experiment running B/X or OSE encounters as originally written, taking distance, surprise, reaction, etc., into account.

This has LOTS of room for improvement, but it takes work. Anyone can edit it (give me credit if you find it appropriate), and I hope there are other generators out there which we can use, add, remix, etc. 

Please let me know! I'd love to have a good perchance generator for B/X or AD&D encounters that I can incorporate to this one!

Additional reading:

https://methodsetmadness.blogspot.com/2023/11/the-painful-procedure-of-random.html

Old school dice pools

So, I just had a fast combat/mass combat idea for D&D, probably from  Chainmail or Delta's blog:

Roll 1d6/level for fighters, half as much for clerics, 1/3 for MUs.

1 misses, 2-5 hit/miss depending on AC, 6 always hits. 

Monsters only need one hit per HD and we don't even need d20s. 

The idea is making combat against dozens of opponents a bit quicker.

But come to think of it, it could be pushed into an entire system. Let's see.

Duels

Two 9-HD fighters facing off would each roll 9d6 and cause an average of 3 hits per round (assuming they hit on a 5-6), so combat would be a bit quicker than, say, B/X.

Ranged combat

Both in real life and D&D, ranged combat is not usually as efficient as mêlée combat. Maybe adding 1 or 2 to AC is enough. To avoid treating an archer like a machine gun, you can rule "missed" shots are time spent in aiming, drawing, etc., and only "hits" or 1s waste arrows.

Against a single target, maybe all damage comes from a carefully aimed single arrow; so a very powerful fighter with a magic arrow could kill a dragon immediately, but this is very rare.

Weapons

Certainly there is some nuance lost here. Let's assume everyone is using a single-handed weapon. 2H weapons might add a dice, while maces may remove a point of AC, etc.

Turn Undead

Cleric rolls 2d6/level. 

Rolling 2-5 turns one HD of undead, 6 damages them. You can alter these numbers to make the cleric more or less powerful, or maybe make turn undead a spell (see below).

Spells

Casters have 2d6/level "magic dice" per day. 

When casting a fireball, it works identically as a fighter's attack, but any 6s you roll are removed from your pool until the next rest. 

(I think I got this idea from Necropraxis).

This fixes a number of fireball problems I usually have.

Same works for curing wounds.

But what about spells that deal no damage? Maybe we could still keep the "roll to cast" and "magic dice" aspects. a 4-6 counts as a success; a 1st level spell requires only one success to function, etc.

You can use several dice to cast a 1st level spell, so you can be sure it succeeds in the first try, but that way you'll also roll more 6s and spend more dice.

Skills

Let's use "hear noise" as an example. Non-thieves have 1-in-6 chances, thieves start with 2-in-6.

So let's say a normal PC rolls 1d6, but a thief adds 1d6/level. Rolling a single 6 means success, so the thief start with 30.5% chance. By level 10, he rolls 11d6, with a 85% chance of success. He won't get to 99% until level 19-20 or so, which is nice, so there is always some chance of failure.

Maybe multiple 6s mean extraordinary success, and rolling all 1s means disaster (e.g., falling from a climb or getting caught in a trap).

Backstabbing is easy; a thief simply attacks as a fighter while backstabbing, and maybe lowers the AC by one if you want them to be really deadly.

Saves

Saves can work similarly to skills. Everyone gets 1d6 plus 1d6/level. 

Notice that the progression from 30% to 85% between level 1 and 10 is quite fitting. You can give fighters, dwarves, paladins etc. an extra die or two.

You do not usually "save" against damage; treat this like an attack against AC (see below).

HP

There is no more HP, only "hits". To make things a bit softer, I'd give each PC one hit PLUS level for fighters, level/2 for clerics etc.

Maybe you could do the same for monsters so that a 1 HD monster has 2 hits and so on. 

AC

AC now is 2 (unarmored) to 6 (plate+shield). 

If you want magic armor etc. you could go even higher, but then you'd need special rules. For example, each time you roll a 6 you can roll again and add 5 to get a result from 6 to 11.

In conclusion...

Well, if you like dice pools, you can see that you might was well play old school D&D with them and a little conversion. But you'd lose some nuance in ability scores, weapons, etc. Maybe just sticking to the d20 is easier.

Still, we have some nifty systems for mass combat, and maybe skills, spells and saves, to experiment with.