Want semi-automated fox embiggening? Lost your dice? Well, you're in luck and also fox cleavage!

I spent too much time writing this, because foxes are worth it: pastebin.com/8d7ja0Mp
Just run "python growfox.py" and have fun. When in doubt, I erred on the side of bigger.

Rolled until I got 9 tails:

Remaining: 4.73e29 (12d20 per roll)
Rolled: 56
Size: 1.37e185 m
Growth: 2.16e14 m/day
Acceleration: 5.90e195 m/day/day
Magnitude: x8192
Tails: 9 (230% fluffier)
Spell Slots: 1.6e29

All in all a slightly large fox.
Also every other fox grew x268435456 bigger, yw.