So lately I've been getting gigantic ideas, many histories, and more than ever I wish I could draw something of respectable quality. My latest, and most solid idea was a new TF2 class char: Mr.Poison. I was drawing some doodles and my friends were talking about TF2 and its latest update. Boing! My doodle turned into a character! As you can see by the name this class is focused on poisoning other characters. For now these are the weapons, and their respective update version:

1.
A - P-Bomb
B - Especial P-bomb
2.
A - Shotgun
B - Green Bullet Shotgun (G.B.S.)
3.
A - Knuckles
B - Those mini scythe used in agriculture

Now let's explain:

1.
A: Basically this is a poisonous smoke grenade which only affects the enemies if they are in the smoke cloud. Takes out life little by little and can kill.
B: Upgraded version, nearly the same but this one has a lower range, takes more life, continues to affect the victim even if he is out of the cloud (P-effect), but it doesn't kill, it just leaves the person with less health.

Common and especial stuffs: Both can be set on fire, but the first burns out faster. This burning cloud of hell affects both teams, even if it was created and set on fire by friendly players. The pyro loses way less health, Mr.Poison only loses health with B but at a slower pace. While being healed one can only lose 1/10 of his life, and lose/doesn't gain P-effect as told in 1 B:.

2.
A: Normal shotgun
B: Shotgun with poisonous bullets which means the enemy gets a weaker P-effect, and start to losing health up to 4/10 of his life.

3.
A: Normal Damage for a melee weapon
B: Crits: +5% Damage compared to normal meele: -35% P-effect: +3% non cumulative

P-Effect: It's similar to being poison, if you're poisoned you can't get more poisoned, poison can be cured but then you're vulnerable to a new dose. Check my gallery for images of the power and visibility of the smoke cloud in both 1.a and 1.B.