Hey!
After first feedback received I decided to re-read the rules and made few small upgrades.

The Magus now can be described as well

I thought it would be nice to know how the magus looks - whether it is a noble woman in honorary dress or crumbled stranger with crazy eyes, gray beard and shrieking voice.

Dice assignment is more clear

I made clear that after initial rolling the dice it is dice themselves that are assigned, not their values. It is a crucial information that was not clear and lead to additional false assumptions.

Age (percentual) die is kept as well

The age die is used to track at least approximate age of the magus. It is important because of new game end condition.

Core mechanic highlighted

I tried to at least highlight the core of the mechanic and make it clear that player compares sum of the dice FACES they chose, not their actual value.

Raising the age die

The age die is now raised after every 10th round to keep track of the age of the magus. Additionaly, when its possible to perform, the player may raise the value of this die by 10 once per round to swap 2 points between two chosen aspect dice.  I hope that new wording makes it more clear how the age die works and when it is possible to use this ability.

Streamlining the end conditions

The game could end in two possible ways - either the player maximizes the values of any of the three aspect dice (e.g. reaches a value 4 on a d4, a 8 on a d8 and so on), or any of the aspect dice reaches zero (do not mistakenly represent 0 on the d10 die as zero. The 0 means 10 in here, just as 00 means 100 on the d% die).
As the player now keeps the track of the age of the magus, I decided to make this an another endgame trigger - when it is not possible to raise the age die anymore, the game ends as well. Nobody wants to work when they turn 110.
I believe it is clear that the game does not end immediately when the d% die reaches 00 value, only when it should be raised again. I also hope that players wil understand they cannot use _time flows_ action to swap 2 points among aspect dice, when the d% die reached its maximum value as the magus would die of an old age.

That's all for now, thank you for your interest and, please, keep sending me suggestions.

See ya.