Time for...
Grief Math!!!
Lets assume that the average magical girl produces a marble of grief per day of general living. Lets also assume they fight a Witch every two days and that each fight produces 20 marbles.
Thus we can say this theoretical magical girl produces 4,017.75 marbles of grief per year.
Toy marbles are generally between 1/2 an inch to an inch. Lets assume grief marbles are 1inch in diameter, 2.54cm, and are perfect spheres. This gives them a volume of:
V = 4/3*Pi*1.27^3 = 8.58cm^3.
So the total volume of grief a theoretical magical girl produces per year is 34,473.29cm^3.
NBA regulation baskballs are between 74.93cm to 75.88cm in circumference. Assuming these are the lower end of the size spectrum:
74.93 = Pi*D
D = 74.93/Pi = 23.85cm
V = 4/3*Pi*11.93^3 = 7,103.36cm^3
We are told there are hundreds of basketballs. The smallest number that fits this description is 200 so using that the total volume of grief extracted is:
V = 200 * 7,103.36 = 1,420,671.83cm^3
This volume of grief is 41.21 times larger then the estimated grief produced by a single theoretical magical girl.
So theoretically a single cleansed grief seed could sustain one magical girl approximately 41 years or a group of say four magical girls for a decade.
This of course does not factor in grief production by the seed since that is as of yet unknown.
Grief Math!!!
Day to day living - A fraction to a marble-ish.
Power use - Anywhere from three or four to double digits.
Emotional trauma - Lots.
Disassemble a Witch - All da marbles
Lets assume that the average magical girl produces a marble of grief per day of general living. Lets also assume they fight a Witch every two days and that each fight produces 20 marbles.
Thus we can say this theoretical magical girl produces 4,017.75 marbles of grief per year.
Toy marbles are generally between 1/2 an inch to an inch. Lets assume grief marbles are 1inch in diameter, 2.54cm, and are perfect spheres. This gives them a volume of:
V = 4/3*Pi*1.27^3 = 8.58cm^3.
So the total volume of grief a theoretical magical girl produces per year is 34,473.29cm^3.
You look around. Depending from your shoulders are ten meter long swathes of the night sky of an alien world carved into reality., your wings, larger than you've ever made before. You might actually be able to fly with these. The air is thick with hundreds of basketball sized balls of Grief, drifting aimlessly about in the air and bumping into each other with dull clacks. In your hand is a Grief Seed -maybe it's just a Seed now since there isn't any Grief inside?- unlike any other you've seen, clear crystal with a single inky black spot in the exact center instead of midnight black obsidian.
NBA regulation baskballs are between 74.93cm to 75.88cm in circumference. Assuming these are the lower end of the size spectrum:
74.93 = Pi*D
D = 74.93/Pi = 23.85cm
V = 4/3*Pi*11.93^3 = 7,103.36cm^3
We are told there are hundreds of basketballs. The smallest number that fits this description is 200 so using that the total volume of grief extracted is:
V = 200 * 7,103.36 = 1,420,671.83cm^3
This volume of grief is 41.21 times larger then the estimated grief produced by a single theoretical magical girl.
So theoretically a single cleansed grief seed could sustain one magical girl approximately 41 years or a group of say four magical girls for a decade.
This of course does not factor in grief production by the seed since that is as of yet unknown.