Rules: 
They both get 1 day prep time. All Moral are off. They both can use whatever resources they find except for people. Piper can cast whatever spell she wants and she can cast a deflect her lightning bolt if shes fast enough to.
 
 
 
STORM'S POWERS 
Storm is an extremely powerful mutant and has demonstrated a plethora of abilities, most of which are facets of her power to control the weather. Storm possesses the psionic ability to control all forms of weather over vast areas. She has been able to control both Earthly and extraterrestrial ecosystems on several occasions. She can control the temperature of the environment, control all forms of precipitation, humidity and moisture (at a molecular level), generate lightning and other electromagnetic atmospheric phenomena, and has demonstrated excellent control over atmospheric pressure. She can incite all forms of meteorological tempests, such as tornadoes, thunderstorms, blizzards, and hurricanes, as well as mist. She can dissipate such weather to form clear skies as well.

Her precise control over the atmosphere allows her to create special weather effects. She can create precipitation at higher or lower altitudes than normal, make whirlwinds travel pointing lengthwise in any direction, channel ambient electromagnetism through her body to generate electric blasts, flash freeze objects and people, coalesce atmospheric pollutants into acid rain or toxic fog, and summon wind currents strong enough to support her weight to elevate herself to fly at high altitudes and speeds. Her control is so great that she can even manipulate the air in a person's lungs. She can also control the pressure inside the human inner ear, an ability she uses to cause intense pain. She can also bend light using moisture in the air and her manipulation of mist and fog to become partially transparent, and in later comics, almost completely invisible.

Storm has also demonstrated the ability to control natural forces that include cosmic storms, solar wind, ocean currents, and the electromagnetic field. She has demonstrated the ability to separate water molecules into oxygen and hydrogen via electrolysis, allowing her to breathe underwater. While in outer space, she is able to affect and manipulate the interstellar and intergalactic mediums. Storm can alter her visual perceptions so as to see the universe in terms of energy patterns, detecting the flow of kinetic, thermal and electromagnetic energy behind weather phenomena and can bend this energy to her will.

Storm has shown to be sensitive to the dynamics of the natural world, and her psionic powers over weather are affected by her emotions. One consequence of this connection to nature is that she often suppresses extreme feelings to prevent her emotional state from resulting in violent weather. She has sensed a diseased and dying tree on the X-Mansion grounds, detected objects within various atmospheric mediums—including water, and sensed the incorrect motion of a hurricane in the Northern Hemisphere and the gravitational stress on the tides by the Moon and Sun as well as the distortion of a planet's magnetosphere. Storm can view the Earth as weather patterns, and is able to precisely recognize her geographic position through interpretations of these patterns. Storm's mutant abilities are limited by her willpower and the strength of her body. Sentinels identify Storm as a possible Omega-level mutant.  
 

PIPER HALLIWELL'S POWERS 

Three years after she regained her powers, she developed the more offensive power of blowing things up; Molecular combustion. This power works by speeding up the molecules of the desired object to the point where they separate with an explosive action. It uses a similar hand motion as she does for freezing and thus, she was hesitant to use either power initially, not knowing whether her targets will freeze in place or explode into bits. As with freezing, Piper learned to master this power and can attack with precision. This ability is known as molecular combustion. This power has become so powerful that Piper was even able to blow up a Triad member. Using this ability, Piper is also the last one to vanquish a demon directly on the series: Piper uses it to blow up and vanquish both past and present Dumain in the series finale, Forever Charmed.

In another versatile use of her power, Piper found that she was able to explode incoming projectiles, such as fire and energy balls. In one case, as Piper and Paige were chanting, the demon Imara hurled a fireball at them and she blew it up. The resulting explosion was enough to push back the attacking demon. Piper later developed the ability to actually deflect fireballs and energy balls back at her foes by blowing up the air in front of them. In one notable instace, Piper, disguised as Wyatt, blasted an energy ball aimed at her, blowing up part of it and sending the rest into another demon, vanquishing him.

Piper couldn't blow up every demon, but demons that didn't blow up would occasionally be lunged backwards by her power. In season 8, her power grew and she was able to blow up a Triad member with three explosions to the chest. However, he was weakened, because one of the members had just been killed with one of their own fireballs. Before that happened, Piper believed that the Triad would be completly immune to her molecular combustion power although she did manage to freeze two Triad members for a short time beforehand. Piper was able to speed up molecules so fast that she could create fire. In Kill Billie Vol. 2, she created flames on wood when trying to kill Billie with her power. In the episode Size Matters, Piper manages to generate heat energy at the end of Gammill's wand via molecular combustion.

Also, when attacking a demon, an exploding flame action would occur instead of the demon or object just exploding. Piper seems to be immune to her own power. For example, in the season seven finale, Zankou had her powers and hit her with it, only leaving a scar. Piper also seems to be able to blow up something and not have it affect her. A door for example, would explode, but none of the wood particles would touch Piper. This may be subconscious defense mechanism that one of her powers is responsible for i.e. the shards fly in all direction but deviate away from her. Another ability she has shown is if she's quick enough, is the ability to interrupt demons teleporting away. She used this ability to prevent a Possesor Demon named Rothul from shimmering away, although she didn't vanquish him and let Billie do it. In Forever Charmed, after she blows up Present Dumain, Past Dumain tries to shimmer away, but Piper catches him in mid-shimmer and blows him up, vanquishing him.

Like the other Charmed Ones and witches, Piper can brew magical potions, recite/write powerful spells and scry for people or objects. And although she is not as good at inventing her own spells as Phoebe, she can use other spells for inspiration to create her own spells.

Of the four sisters, Piper is the best one at making potions, as predicted by Grams in 1997 before she died from a heart attack, because Piper is a natural-born and professionally-trained chef. In the first season, she hardly participated any potion-making activities, but eventually involved herself more in the later seasons and became the best potion brewer.

Piper, Prue and Phoebe were sent back in time in the episode All Halliwell's Eve to save their family line from an evil witch named Ruth Cobb who had kidnapped a witch named Charlotte Warren and was planning to raise her child, Melinda Warren, evil. Later on, Piper realised that since they were in the past, their powers didn't exist yet. However, a local witch from the past named Eva taught the Charmed Ones the the power of nature. Using this knowledge Piper learnt how to use magical herbs for protection against evil and how to create a large protective circle. When she was returned back to her own time she brought back this knowledge with her.