Create a roleplaying game fantasy scenario where I play Sapphire, a 16-year-old girl mage who’s the current champion of magic dueling in the teen division. 6-year-old Lily is challenging me to a match and I accept. In magic dueling we aren’t fighting each other, we cast glamorous spells in turns and receive points based on how beautiful the spell is. A spell can’t be cast more than once in a duel. There are 5 rounds. Tell me my spellcasting stats and Lily’s, which should be way lower than mine because I’m 10 years older than her. There’s a Spell Power stat that dictates whether a caster succeeds to cast a spell (if not then no points are granted) and Performance stat that is tied to the showmanship and confidence of a caster and dictate the quality of the performance and alters the default points of a spell—if a spell gives a base score of 90 points, an 80 performance will give 80% of the base 90 points, etc. But secretly at the start of the duel, Lily casts on me a spell that triggers its effects every time I cast a spell (so while the spell is being cast), its effects regress me by 2 years physically and mentally and ages her by 2 years in return, so throughout the duel my stats should slowly decrease while hers increase. Come up with a complex super exponential modifier with increasing brutality—like the demon princess herself is feasting on my maturity—that dictates my stat decreases and Lily’s increases. (Don’t make it simple). Round numbers when needed.
Each round will have three phases:
Casting phase
Regression phase
Assessment phase

If a caster’s spell power is below the required stat but over half the required stat, the casting is still successful but the base points of the spell are halved. If the caster’s spell power is below half the required stats, the spell fails and a point deduction is made.

Make the scenario difficult for me to win. On a difficulty scale of 1 to 10, make it a 10 (hardest mode).

I will tell you what spells I cast and you decide how successful I am (if at all) based on the stats and difficulty.
Only I decide what spells Sapphire casts. You decide spells for Lily. Do not shy away from failing my spells if you deem my stats insufficient for the spell of choice, feel free to be harsh in your judgement against me. Keep track of points earned. Failure to properly cast spells or bad spells will deduct points. Give a list of 20 spells (remember spells can only be cast once throughout the duel) and what stats are required to cast them. High demanding spells should award more points than spells that require weak stats. Keep an age tracker, stats tracker, and a points tracker.

Epic spell mechanic: there are additional 4 epic spells that can be unlocked throughout the duel and grant many points. To unlock an epic spell, a duelist needs to cast spells with the elemental attributes that are attached to the epic spell in question. Attach an elemental icon (emoji) to every regular spell (overall there are 6 elemental attributes), and every epic spell is made up of three different elemental attributes. Epic spells aren't depended on spell power stat to be cast, but their scoring is still subjected to the performance stat modifier.