Machina is ancient lost technology that is powered by machina crystals. These are a kind of magic item that were built and how to make them is lost, yet some are found and repaired and used today. Having a working Machina is a status symbol. All known magic items are some form of Machina. Though most stable items have the crystal built into the item and seem to work for long periods of time with no issues, other require crystals, and in some cases special crystals to use.
-Stable items are most your basic magic items such as a ring of protection.
-Active Machina require attaching crystals that are consumed to power the item. The value and type of crystal will depend on how long it last.
-Unstable Machina are extremely rare but take up a larger number of crystals that are often consumed for one use.
Many stable Magic item require attunement but not all. Few active and no unstable items require attunement.
Most crystals will absorb into others of the same color with a magic user giving up a slot to power the merge. Crystals can also be split out in the same fashion. The knowledge of how to do this however is a well-kept secret.
All non-red crystal draws monsters to the location from great distance. This seems to happen much more so once the crystal is disterb or in motion.
Spotting arias with more or stronger monsters is often a sign of local crystals.
Monsters don't even seem to notice the crystals them self normally just ignore it. Monsters just seem to like making a home within an aria of them.
(If you are proficient in Arcane you know)
Once a crystal is active in a machina or used/consumed for spells it does seem to draw them to the location faster.
Every town needs these. This is the ONLY crystal that seems to keep away the monsters. For that reason towns will farm and pay for them. ALL towns and settlements will have one or more of these in an active Machina to keep out the monsters. This is the main reason towns send out adventures, to find more. If a town or city louses its Heart, the town will fall. All towns treat endangering the heart as capital offence, and even threating to harm one is often a reason to be put to death.
Magic component price, 10g/lb
Also known as stable crystal. This uncommon crystal is needed to repair any and all stable magic items. It is theorized its also how one might make new ones. This crystal does not attract monsters except in extremely large amounts. (about 50+ lb)
Magic component price, 100g/lb
The most common of the ones found. but often the main choice to power machina. Does not attract monsters except in larger amounts. (About 25+ lb)
Magic component price, 200g/lb
This very rare crystal is often coveted by spell casters. If a spell caster takes an action to focus on the crystal it consumes it into themself and restores 1lvl of spell slot per pound.
This is known for attracting monsters when more then 10lb is close together.
Magic component price, 500g/lb
These crystals are extremely rare and seem to attract monsters at a much higher rate. The more one has on them the more likely they attract any. When in a field of a heartstone it seems to hamper the masking effect.
Magic component price, 1000g/lb
This very rare and unstable crystal is coveted for its use in Machina, it last longer and works better than most others.
Magic component price, 2000g/lb
This extremely rare crystal is an adventures dream find. It does attract monsters in any amount but often worth the risk.
Magic component price, 25,000g/lb
There is only stories of a few of these ever being found. Legend is told that people with it have seen visions of glimses of Mother.
Here is an easy token. Token IX9