Alchemist/Counters

Bad against...

 * cancels out 's rapid health regeneration.


 * greatly reduces 's attack speed advantage.


 * can kill Alchemist before has the time to heal him.


 * , followed by take advantage of Alchemist's low base armor, making it easy to quickly kill him with physical damage.


 * - Invokers can win the mid lane easily against Alchemist because regen will nullify 's damage over time and  damage bonus will allow Invokers to out last hit Alchemist.



Others

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Items

 * reduces 20px's already low base armor even further, and protects against his rapid physical attacks.
 * reduces 20px's attack speed and gives a fair amount of armor.
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Good against...

 * 's abilities rarely do enough damage to seriously harm Alchemist.


 * kills Phoenix very quickly in.


 * will take down in no time.
 * Alchemist can also farm the zombies for easy gold.


 * 's health regeneration and attack speed bonus will make fail.


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Others

 * Every farmer heroes because they disadvantage to get money and in fight

- Nature's Prophet : He has low HP so Alchemist can take out him fast. Also his Acid Spray and Greevling Greed is best effect with treant so he can rich faster. More benefit of Acid Spray, if NP try to sprout himself for escape with low health, he can die before teleportation done. Thanks Radiance too.

- Meepo : If you Earthbinded and Poofed, your Acid Spray will decrease Meepo armor and Armlet/BKB will help you and give chance to kill him with Stunning potion. Don't forget your ultimate, Chemical rage to kill him fastly before he survived. Suggest to have tanker item like Assault Cuirass, Armlet of Mordiggian, Heart of Tarrasque, Abyssal Blade, Blademail.

- Arc Warden : Even Arc Warden is the best heroes to use Hand of Midas, his GPM will never faster than Alchemist. Because Alchemist can get more than 380 golds in 100 seconds. In combat Arc Warden mostly lose Alchemist because his few starting armor and Magnetic Field is useless to defense melee heroes. So Alchemist can kill Arc Warden before he call Tempest Double. Lastly, Alchemist Chemical Rage can kill army of Arc Warden in fast time and tanky enough to receive Last Will.

- Beastmaster

- Naga Siren

- Lycan

- Lone Druid

- Tinker : He isn't farmer but he can't fight Alchemist except he has Lotus Orb. Because Alchemist's Chemical Rage regen fast enough after shot by Laser and Missile or he can take no damage with Spell Immunity Item. Acid Spray can reduce Tinker Armor who already has few HP too. Even he hid well while Pushing with his robots, Alchemist and his teammates can Blademail him because Tinker not mostly to build Eul.
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Works well with...

 * combined with makes Alchemist attack at insane speeds.


 * and will purge nasty stuff away.
 * combined with may give you some serious sustainability.
 * is an aoe purge, which will remove from enemies buffs like and, and also root them.


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Others

 * Alchemist works well with any hero that has an upgrade, as he can farm it for them (most likely far more quickly) and also free up an inventory slot. Some heroes have permanent Scepter so it's useful to have one more item. Like Meepo, Timbersaw, Morphling, Treant Protector, Ogre Magi. Or the other way, you can help poor support which most useful in war.
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List of heroes that counter Alchemist, and list of heroes that work well with Alchemist.