I asked and found about the Mutable Device.
It can only be used on Enchanted devices not on invested.
It adds +10 to level.
Items enchantmend can be changed in one season with 1 pawn of vis, and level can not be raised.
I think it is mostly useless. You can not make items better.
I think better version would be…
Only used on Invested Items. Not on talismans.
One item can only hold one enchantmen. Mutable enchantmen takes the whole item.
Add+5 to level.
It is Minor Hermetic Virtue (minor breakthrough)
Items enchantment can be altered with difficulty (original level + [level of changesX2]) versus lab total.
Even if the level of the effect does not go higher or lower it is counted as a change (example: rising touch to voice and lowering concentration to momentary is +10 change)
Cost pawn of vis 1 per changes in levels/10 rounded up.
Must be room for added vis in invested item as is normal in rules.
Examples. Wand with Agony Of The Beast with 24 uses in the day is level 20 effect.
Agony Of The Beast as mutable with 24 uses is level 25 effect.
Invested wooden wand that has been opened fully with 4 pawn of vis and then is enchanted with mutable AotB cost 3 vis to install. If later the AotB enchantmend is changed from 24 uses a day to unlimited, difficulty will be 35 (original 25 +[5x2]) and cost 1 pawn of wis, and there will no more room in the wand for furter changes.
This way you can make object better as you develop and don’t have to start all over again each time.
I was thinking it as a minor hermetic breacktrough and as a new minor Verditius mystery.
Does this work?
What needs to be changed?
[size=50]Is it possible to chance the spells in encanted items?
Example: If magus was not skilled enough to make a spell with range/duration/target as high as he wanted, could he later rise the items spells range/duration/target?
Since this is not evedently possible, how about this.
Minor Breakthrough: New Minor Verditius House Mystery : Amplify Invested Items
Good goal for a magi.[/size]
[size=50]If a magus has a enchanted item that has a mental trigger, (item has a spell that reads magus toughts all time so it can activate from correct tought trigger) does his parma magica need to be supressed so that magic item can read his toughts, or does the item need high penetration to be able to get trough?
Also if enchanted item gives magus some constant effect does he need to suppress his parma magica all the time?[/size]