My version :P
Passive: Crystal Energy (max 100)
Skarner's resource is crystal energy. As he gathers it in combat, he becomes a more ferocious and terrifying combatant. Skarner gains 1% attack speed and .8% movement speed for every 2 points of crystal energy he has (max 50% increased attack speed and 40% increased movement speed). Skarner's crystal energy begins to fall off rapidly when out of combat. Skarner gains 1 point of Crystal Energy per basic attack against a foe, triple effect vs large minions, large monsters, and champions. Skarner does not gather Crystal Energy from tower's or other structures, but will still be considered "in combat" so as not to lose his current energy.
Q: Crystal Slash---------Cost: None-----------Cooldown: 4 seconds
Skarner lashes out and deals 20/25/30/35/40% total AD physical damage to enemies around him. As long as Skarner has at least 1 point of Crystal Energy, this attack is empowered and deals an additonal 20/25/30/35/40% total AD magic damage. Enemies hit by this attack grant crystal energy as though they were struck by Skarner's basic attack. Basic attacks reduce the cooldown of this ability by .5 seconds, double effect vs champions, and large monsters.
W: Crystalline Exoskeleton------Cost: 40 Crystal Energy------ Cooldown: 16/15/14/13/12 seconds
Passive: Skarner's skin is his armor, and is empowered by his Crystal Energy. As long as Skarner has at least 1 point of Crystal Energy, his armor and magic resist are increased by 10/10.5/11/11.5/12%.
Active: Skarner draws on his Crystal Energy to heal his wounds, regenerating 10/12/14/16/18% (+1% per 50 AP) of his missing health over 6 seconds.
E: Fracture---------Cost: 20 Crystal Energy----------Cooldown: 10 seconds
Skarner fires a blast of crystal energy in a bolt, dealing 60/90/120/150/180(+80% AP) Magic Damage to each target hit in its path. Targets struck are slowed by 40/45/50/55/60% for 2.5 seconds and are marked for 5 seconds. If Skarner lands a basic attack on a marked target, they are stunned for 1 second and Skarner gathers an additional 1/1/2/2/3 Crystal Energy from them.
R: Impale----------Cost: None------------Cooldown: 120/100/80 seconds
Passive: Every 6/5/4th basic attack from Skarner is a strike with his tail. This attack does not gather Crystal Energy, but instead deals bonus magic damage equal to 10/15/20% AD and slows the attack and movement speed of his victim by 5/6/7% for 3 seconds. This debuff can stack on a single target up to 3 times. Additionally, Skarner's Crystal Energy will not fall below 10/15/20 while out of combat.
Active: Skarner rears his stinger, rooting his target for 0.25 seconds as he brings it down, and suppresses them for 1.75 seconds, instantly gaining 10/20/30 Crystal Energy, and dealing 100% AD physical damage. The target also takes 100/150/200(+80% AP) magic damage over 1.75 seconds. While suppressed, Skarner can move his victim around and activate abilities, but he cannot basic attack.