Charms were explicitedly mentioned in the design. If they prevented explosions, they would have been used.
Antimagic bombs
An oversized arrowhead made of quartz, composed of many facets of miniaturised antimagic crystal. It contains a core of explosive antimagic charm with spines extending outwards to draw the initial magic to itself. These need to be stored with a proper antimagic charm as they will explode after relatively little contact with active magic. The effect is that should they strike a hard surface, they will tend to scatter antimagic facets around the area. Should they strike a soft surface, they will explode relatively soon due to contact with ambient magic and scatter antimagic facets around the area. This will consume the magic in a large(compared to the charm's coverage) area making conventional spellcraft impossible for a short time before the tiny crystals become overloaded and burst into flame, creating an incendiary hazard. forcing enemy wizards to relocate during a heated battle can only be of benefit.
The bombs themselves are a very simple act of putting an antimagic charm on an arrow. The actual magic development here, of course, is the magically-stimulated growth of quartz into specific forms. Many mathemagicians died(Well, missed sleep and were called nerds) to bring us these plans.
Design: Antimagic Bombs [6, 4, 5]
Though our earlier incidents with exploding anti-magic charms was done with diamonds, it doesn't take much to modify our new quartz charms to also explode. It's even easier to do, in fact, thanks to the lower quality of the material. Once we have the spellwork down it's a simple matter of enchanting quartz crystals cut into the shapes of arrowheads to fashion our first anti-magic arrow.
As an extra bonus, we've managed to specify the crystal to reach peak temperature before shattering violently; the shrapnel does most of the damage to soft, unarmored tissue, but the super-heated crystal shards can start fires if they land in dry grass or soft fabrics.
Hitting a mage with an arrow will likely result in death for the target and minor lacerations for unarmored bystanders. Unfortunately, the relatively low stopping power of a crystal shard means they wont be able to penetrate shields and armor once the arrow head explodes, but we've noted that if it explodes once shot into a wooden shield it will punch a small hole through it. Sustained fire against shielded enemy mages will slowly reduce their cover so long as they cast.
Due to the complexity of crafting anti-magic charms and fashioning them into perfectly weighted arrows, they are Expensive and will be given exclusively to our Mage-Hunter squads.
A minor problem we've noticed; the arrow head doesn't discern between friendly magic and enemy magic. The entire quiver will explode suddenly and violently in the presence of any magic, including our own. As a precaution, our Mage Hunters will be kept as far away from our magical forces as possible. Expensive.
Things not mentioned:
many facets of miniaturised antimagic crystal = the shrapnel does most of the damage to soft, unarmored tissueMundane shrapnel, no largish field of short-lived antimagic charms. I was expecting maybe a half-dozen metres, enough that the mage couldn't cast without moving or burning their surroundings while having a couple of spells fail. They are small, so their individual capacity would be low while the full charms have an almost limitless capacity but those only effectively cover one person, but they spread out. Duration lost to increase area.
need to be stored with a proper antimagic charm = Mage Hunters will be kept as far away from our magical forces as possibleThey use the same technology, an Antimagic Charm should affect a larger radius than the core charm which should have a larger radius than the shrapnel charms. An antimagic charm really ought to absorb all the magic before it can reach the bombs. But results could vary...
strike a hard surface, they will tend to scatter antimagic facets = relatively low stopping power of a crystal shard means they wont be able to penetrate shields and armor once the arrow head explodesNor before either by my estimation. I mean, it is quartz! Fat chunky quartz with spikes out the sides at that, no bodkin to be seen... They were never meant to affect armour, only magic.
strike a soft surface, they will explode relatively soon = reach peak temperature before shattering violentlyWow, bonus, nice!
explode relatively soon due to contact with ambient magic and scatter antimagic facets around the area = into a wooden shield it will punch a small holeOh, well, holes are nice.
magically-stimulated growth of quartz into specific forms = crafting anti-magic charms and fashioning them into perfectly weighted arrowsI guess I was being too ambitious? I mean, we just barely have enough charms for our thanes or something and shooting them seems expensive. I guess I should have presented the quartz growing as a design to make existing items cheaper and the arrows as a revision?
need to be stored with a proper antimagic charm = A minor problem we've noticed; the arrow head doesn't discern between friendly magic and enemy magicIt is a good thing that we noticed that yes, the arrows will, indeed, blow up in the presence of magic. A good thing then that we have something that absorbs magic.
There is a lot of variation from the suggestion to the outcome. I am not really reading too much into anything that is not specifically mentioned. I assume that antimagic charms simply are not part of our hunters' current equipment so it wasn't factored in. We reposition the charms to our elitiest of the elite archers and rely upon them to keep the mind-0readers at bay.
I am optimistic that an antimagic charm which absorbs all the magic around a person will protect that person from magic that would cause the one or two bombs amongst the arrows in their quiver to explode. Obviously the enemy can do the same thing, but having to stop and antimagic the bomb in your face, then get someone to ferry it away, and likely clean up all the little ones scattered around the place, is, well, it is easier to just pick up your shield and walk away, meanwhile there are a bunch of people waiting to shoot you reposition, or, indeed, you can't stop fireballs like this so... Well, unless our charms stop fireballs, but, ehh, I figure those are like conjuration, magic enough to be unmade by the no-fun-zone the keggers use but mundane enough to work within the area of our charms so long as it is not actually being conjured within one. But still, an ordinary fireball should make the charms go boom, and the mage is busy keeping the charms calm so having them burst from cancelling one of our fireballs is still them at a disadvantage.
3 Sell Wand of Fireballs: Azzuro, 10ebbor10, Andrea
1 Seize ship: Azzuro, RAM
2 Sell crate of crystal weapons: 10ebbor10, RAM
1 Sell steam engine: FallacyofUrist
5 Sell original steam engine: Chiefwaffles, stabbymcstabstab, Tyrant Leviathan, roboson, RAM
2(-3=-1) Do not deploy anti-magic arrows : 10ebbor10, Azzuro
3(-2=1) Deploy anti-magic arrows: Chiefwaffles, Andrea,RAM
1 Sell crate of crystal weapons, original steam engine, and Wand of Fireballs: Andres
1 Use channelled fog where it is likely to be hit by antimagic. Inform us of the results. shamelssRAM
1 Use crystal weapons which are protected by antimagic: put some caltrops and an antimagic charm down someone's pants and put a crystal axe in one hand and a gem-powered crystal axe in the other then stick them in front of a firewall protecting our archers then wait for it to go poof and check what survived. shamelessRAM
1 Give antimagic charms to our elite anti-wizard guard or hunters or whatever they are now. Especially the ones who are carrying bombs. shamelessRAM
Fine, I'll throw my hat in for seizing and selling stuff. Plunder to Arstozkings!