Acupuncture - Energized

Name: Acupuncture – Energized
Requirements: 1” long, micro (either already super thin or shaped to be) needles (man- or nature-made, I’ll be using porcupine quills). Agility 10.
Stamina cost: One stamina per person per post. +1 each level after level 2
Downside: After the duration is over, any negative points in Stamina get taken from Mana, if Mana reaches 0, then it takes the points from Health.
Post duration: one post to stick with needle, energizing effect is immediate. Effect lasts 5 posts. only usable on each person once per battle topic
Type: Buff
Range: close range, needle by hand.
Base Damage: none
Other Effect: Creates an energizing effect that gives the target 50% of their used Stamina back (50% or until at their standard Max)... Ex. Normally have 50 Stamina… in a fight used 40 of it, Acupuncture – Energized gives you 25 Stamina back giving you 35 total… but if you only used 10 Stamina and are at 40, you can only get back up to 50.
Level needed: 2
Rp Sample link:
*So tired… can’t keep running much longer* This thought kept running through her mind as she chased her Father, who, in a drunken act of childishness, decided it would be fun to play a game of tag with his kids. Tokara gave up so quickly it almost wasn’t even funny, at least he knew his own limits of agility. *Cheating centaur… of course it’d be harder for a non-centaur to be IT…* He was tiring out, but so was she. She could catch him soon enough when his stamina ran out… if she could only last that long.

A light prick with her acupuncture needle on the back of her hand (so he wouldn’t notice what she was doing right away) and she instantly had even to last a while longer. Pretending to be tired still, she stopped running. Her father also stopped, panting for breath. Falabella burst into a run, taking the 5 feet distance and finally tagging him on his hind leg. *Finally!* Her father looked at her shocked, where did her energy come from? He notices the needle in her hand. “Cheater!”

“How dare you call me a cheater when you, a centaur, make a sprite IT in a game of tag?!

“Oh… ya… Haha”
Description: A needle placed gently in different places on a person’s body activates certain hormone generation and distribution throughout the body. This immediately energizes the target, causing a “Red Bull” type of energy. Good to use during long travels when stamina is low, or running from enemies.
See “Hypo Acupuncture – Thrown or Blown” for information and stats on using this ability as long ranged.

So is there any negative effect to this?

Edit in a cooldown or limit to usage per person used on per topic.

Also edit in that if it would bring your stamina below zero that instead of health it would reduce mana that would work. For a lv. 2 skill stamina restoration is too good of a skill.

Added:
increasing Stamina cost scaling per level after level 2

mana drain for negative stamina points, and health drain if mana reaches 0 and there is still leftover negative points

only once per person per battle

Approved with it noted that... Example :you use the skill and at the time have 10 stamina, and once it comes into effect now have 35 stamina. By the time the skill is over you have 5 stamina left then the stamina effect wears off. If not for the skill you would have had gone -20 in original stamina. Now instead of it coming out of health you lose 20 mana.

I believe this is what you had intended with what you said, but just trying to clarify though it looks as though I may have confused things more reading back through it.