Comments

It's not clear that dice-sizes are assigned to each aspect; when you say "roll them one after another then assign them" it's unclear if you're assigning each rolled number or each die to an aspect.
"choose up to two aspect dice... from above as close as possible." Does that mean the size of the aspect die, or what the aspect die currently shows? IE does a d6 showing "2" count as a "6" or a "2" ?
"if the age of the magus allows it..." we only know the magus's apparent age, and how do we know when that age "allows" or forbids things?
"when you succeed to fulfil..." how do we know when an aspect is fulfilled? Is it when that aspect's die size increases past d12 ?

There's good stuff here, just need clearer instructions.

Hi, Mozai, thanks for questions, I'll gladly answer them.

I'll reword the assignment rule to make it clear that player is assigning the dice themselves, not their values. I can see now that it's kinda unclear as its more common to work with dice values.
"Then choose up to two aspect dice, whose sum of the sides approaches the rolled value from above as close as possible." - I am sorry, I really though that "whose sum of the sides approaches the rolled value" si clear enough. English is not my first language, if you find better wording for this, I'll update it as well.
Age of the magus is kept on the d% die as well as aspects are determined by their dice. Saying that, if you cannot raise the d% die by 10 as you passed a hundred, you cannot play a Time flow action, as your magus may be dead by that time.
Fulfillment of the aspect is declared with their dice being raised to the maximum value. I'll make that clear as well.

Thanks again for your questions, it will make the game more clear!

Magus Of Mistborrow