Dota 2/Razzil Darkbrew the Alchemist

Alchemist is a melee strength hero who is usually played as a carry. He can get gold much faster than other heroes with his Goblin's Greed. He also has good damaging abilities with his Acid Spray and Unstable Concoction. In bad situations, Chemical Rage can turn the fight around. Although considered one of the worst heroes in the game, underestimate Alchemist and you can end up with a humiliating defeat.

Acid Spray
Acid Spray creates a pool of acid over a wide area. Enemies entering the acidified area will slowly take damage while having their armor reduced. The damage dealt is composite damage, which is reduced by both armor and magic resistance. A good pushing as well as farming tool, it lets you kill off groups of creeps at once if they are all in the area, letting you get more out of Goblin's Greed. The armor reduction is also helpful during teamfights making strong agility heroes less durable.
 * Ability: Target Point
 * Damage Type: Composite
 * Radius: 625
 * Duration: 16
 * Damage Over Time: 8 / 16 / 24 / 32
 * Armor Reduction: 3 / 4 / 5 / 6
 * Mana Cost: 160
 * Cooldown: 22

Unstable Concoction
Unstable Concoction makes you brew up a flask of volatile chemicals, which damages and stuns enemies when thrown. The longer he brews it the more damage and stun time the concoction will do. It reaches its maximum power after 5 seconds, but if you don't throw it after 7 seconds, it will explode on yourself, making you take all the damage and stunning yourself. With a 4 second max stun it can be a pretty scary nuke, but as your enemies will be able to see how much your concoction is charged up they will likely start to get out of range before you can throw it.
 * Ability: No Target
 * Damage Type: Physical
 * Max Stun: 1.75 / 2.5 / 3.25 / 4
 * Max Damage: 130 / 200 / 270 / 340
 * Mana Cost: 120
 * Cooldown: 16

Unstable Concoction Throw
Throws the concoction at a targeted unit.
 * Ability: Target Unit
 * Affects: Enemy Heroes

Goblin's Greed
Goblin's Greed lets you get bonus gold from last-hitting creeps. For every creep you kill after the first you get more bonus gold for 20 seconds. You can get a maximum of 26 extra gold from a creep kill. Note that killing creeps doesn't lengthen the recent kill window. It will reset as soon as the 20 seconds end. You will likely only get the full 26 gold bonus if you manage to kill of an entire creep wave at a very short amount of time. Since you will always get more gold than other heroes, you can farm up your important items much faster.
 * Ability: Passive
 * Recent Kill Window: 20
 * Base Bonus Gold: 2 / 4 / 6 / 8
 * Extra Bonus Gold: 2

Chemical Rage
Chemical Rage temporarily reduces your base attack time and increases your health, health regeneration, mana regeneration and move speed for 25 seconds. A basic self-buff that can help you survive longer and dish out a lot more damage. If you are out of battle and low on health, you can also use it to restore lost health, since the bonus regen will heal you back up. The mana regen it grants you is even enough to completely negate the mana needed to use it.
 * Ability: No Target
 * Duration: 25
 * Base Attack Time: 1.45 / 1.3 / 1.15
 * Bonus Health: 300 / 600 / 900
 * Bonus Health Regen: 15 / 30 / 60
 * Bonus Mana Regen: 3 / 7.5 / 12
 * Bonus Move Speed: 30 / 40 / 60
 * Mana Cost: 50 / 100 / 150
 * Cooldown: 45