Metamagic apparatuses grant the ability to use a metamagic effect on a sphere effect three times per day, without needing to know the metamagic feat, increase the time spent casting, or spend additional spell points for the metamagic. This is done as part of casting the sphere effect and requires holding the apparatus in at least one hand (or otherwise wearing it as appropriate for its form). Normal Metamagic apparatuses work on sphere effects up to caster level 13th. Lesser Metamagic apparatuses work on sphere effects up to caster level 7th, but cost half as much as a normal metamagic apparatus. Greater Metamagic apparatuses work on sphere effects of any caster level, but cost twice as much as a normal metamagic apparatus. Remember that you may always choose to cast sphere effects at a lower caster level than your maximum (as long as you still meet any caster level prerequisites, which are common for advanced talents). Metamagic apparatuses normally cost 10,000 gp x spell level adjustment or maximum spell point cost. Metamagic with an effective adjustment of +0 cost half as much.
Metamagic apparatuses always have a faint untyped Aura of magic for their lesser versions, a moderate untyped Aura for their normal versions, and a strong untyped Aura for their greater versions. They also have a caster level of 5th for the lesser versions, 10th for the normal, and 15th for the greater.
Appearances for metamagic apparatuses vary greatly. Some are carved as slender rods to help the caster aim, while others may be made from the skulls of ancestors, imbued into holy symbols, fastened into shields, or enchanted into a ring. Regardless of form, you may only use one metamagic apparatus per casting (though it is possible to use more than one per turn if you are casting with different actions, such as a quickened talent as a swift action and another talent as a standard action). You may apply other metamagic feats you know when using a metamagic apparatus; these increase spell point costs and adjust casting times as normal. If a metamagic apparatus can apply multiple metamagic feats at once, its uses per day and its cost are cut to 1/3 of normal. This typically reduces a metamagic apparatus to 1 use per day; if it would normally have more, round up as needed.
Some metamagic apparatuses only apply to talents with certain descriptors. For damaging effects (i.e. destructive blasts), a talent has that descriptor if it does that type of damage. For example, the Shattering Blast (blast type) talent has the sonic descriptor. The GM is the final arbiter of whether or not a particular metamagic apparatus should apply to a given talent.
If a metamagic apparatus requires you to cast a particular talent or effect (such as using the cure ability of the Life sphere), you may apply any of your other applicable talents unless the metamagic apparatus forbids them. For metamagic apparatuses, any reference to spells includes all sphere effects that can benefit from metamagic.
A character may gain the effects of a metamagic apparatus as a feat instead, allowing them to use it any number of times per day (as long as they can pay the spell point cost) and on effects of any caster level, subject to their stated limitations and prerequisites. For ease of use, these abilities are also available in feat format on the Metamagic Feats page. SP Costs for using metamagic as a feat are included in the description of these apparatuses (under ‘Feat cost’). These effects are preferred over the original text for metamagic feats, since some of these needed to be altered to work with the Ultimate Spheres of Power rules.