Manastone, Huge

• Cost: 10,000 gp
• Weight: 100 lbs.

Manastones are small pseudo-crystals that are formed through a magic ritual requiring a circle of magic users. The manastone itself is technically not a physical object at all, despite feeling like a crystal. Instead, it is pure mana that has been coalesced and compressed into a stable form. They are not dangerous (particularly), and won't shatter or explode if dropped, though eating them is strongly discouraged.

Huge manastones can be used to power any large, community scale magic item which uses expendable charges, such as magical defenses around a mansion or castle. They can also be used to power large mystical vehicles, such as Crassis Engines or Alchemical Dirigibles. They are far too large for use with any hand-wielded device, but may be used with various siege weapons of a magical nature. A huge manastone starts with 5 'huge' charges. To use a huge manastone, you must emplace it in a magical Circle, which is usually built into or nearby to the feature the huge manastone is meant to power. Huge manastones can run such large features for a period of time, depending upon the feature. A street-cleaning magic might use one huge charge per decade, while a Thundergonne Siege Weapon might use five charges with every shot.

Placing a huge manastone in a circle requires a full hour of heavy lifting and exacting concentration. Once the hour has passed, the large-scale item gains 5 charges, up to its maximum, and the manastone is expended, crumbling to dust. Any charges over and above the maximum that the item can hold are wasted. You cannot partially discharge a manastone, or otherwise try to split how many charges are recharged; it's all or nothing.

• Crafting: Spellcraft (DC 150; this DC can be split evenly among the magic users in a mage's circle ritual); requires that the creator(s) be in the presence of a ley line.