Item Build

Starting Items

Early (Buy regen if low)
Core (Required, in order)

Situation (only if needed)
Extension (choice, Any order)

Ability Build

Acid Spray


Unstable Concoction


Greevil's Greed


Chemical Rage


Talent Tree


+{s:value} Attack Speed

-{s:value}s Unstable Concoction Cooldown

+{s:value} Health

+{s:value} Damage

+{s:value}% Cleave

+{s:value} Unstable Concoction Damage

+{s:value} Chemical Rage Movement Speed

+{s:value} Chemical Rage Regeneration

Author's Ability Notes

Acid Spray secures your lane, but also pushes it. It also improves your farming, but at a high-mana cost. Use Acid Spray right before fights to lower their armour to make fighting easier. Use Acid Spray to clear stacked Jungle camps, hastening your farm even faster.
Unstable Concotion takes 5 seconds to reach its max stun duration. Before TP'ing into a fight or to defend a teammate, activate your Unstable Concotion so you can hit foes at a longer length without them being able escape. Affects all units around the target, even if self-casted.
We get a point in Greevil's Greed early on for the multiplier bonus earned by collecting bounty runes. Works regardless who gets bounty rune.
This ultimate has a relatively low cooldown and offers a ton of HP regeneration. Use it to farm; it's also great to survive ganks and get that extra movement speed. When getting slowed or disabled, considering using your ultimate as a Dispel to rid all annoyances. Early on, you rely on this ability to survive while farming the lane and jungling.
+{s:value} Chemical Rage Regeneration : Increased Health Regeneration when using your ultimate

Author's Item Notes

Early (Buy regen if low)

Soul Ring consumes your life to have the mana to cast Acid Spray. Thanks to your Chemical Rage, that health is regenerated quickly over time.

Core (Required, in order)

Only buy Aghs for teammates that have a good Aghs effect. Not everyone needs their Aghs and prioritizing those who do is key. The more Aghs you collect, the more damage & spell amp. you will earn once you hold your own Aghanim's Scepter (or blessing).
Blink Dagger helps you initiate with Unstable Concoction to ensure you can maximize the charged duration and land it on a foe before they can react or escape. Cast Acid Spray right as you blink in to maximize the damage of Unstable Concoction.
The value of Solar Crest comes from its movement speed and its dual usage depending on the situation: either to impart some of your armor to help an ally attack faster and survive physical damage OR to reduce an enemy's armor to utilize your physical damage or spells for further effect. The mana regen from Solar Crest is just enough to help you spam spells when farming or ganking.

Situation (only if needed)

Rely on your position 4 to refill your Bottle whenever they TP back to your tower after roaming/ganking. Pick up Bounty Runes to refill your bottle as well.
Heaven's Halberd provides more survivability through evasion. To add, it also increases your life-steal/regeneration, reduces stuns and can disable foes. Use before your opponent’s pops their BKB as the Disarm will pursue even after.
Black King Bar is to help Alchemist maximize his damage output during Chemical Rage. It also allows you to cast Unstable Concoction without being interrupted at the very last moments.

Extension (choice, Any order)

Lotus Orb provides the armor to give more survivability but also allows you dispel big stuns/slows or reflect back nuke damage on your teammates who keep getting targeted.
Alchemist has incredibly weak armour throughout the game. Assault Cuirass will lessen the issue. With your Acid Spray and Assault Cuirass armor reduction aura, you should be able to tear down foes.
Mjollnir for a offensive Alchemist to really push his farming potential, strong attack speed and to combat illusion-based heroes (e.g Manta Style). The mix-up for Chain Lightning magic damage as well as the damage from Alchemist's melee attack can be enough to completely wear down teams. Don't forget to cast Static Charge on yourself to punish enemies who target you.

Other Items

Get Silver Edge to initiate with your Unstable Concoction. If timed correctly, you can Break the damage, deal bonus damage and maximize your stun duration making your ganks all the more potent.
Radiance, in combination with your Greevil's Greed and Acid Spray; mean fast jungle camps, push lanes at an incredible rate and ultimately move onto even larger items. Combined with your Chemical Rage means Alchemist stays in fights longer and his Burn damage from Radiance lasts longer.
Manta Style is to help with your farming even more and Radiance works with your illusions, allowing you to push even more lanes, push more towers. Helps to dispel silences and slows that can prevent you from fighting.
Armlet of Mordiggian adds to Alchemist's stats while its negative effect is mitigated by Alchemist's ultimate: Chemical Rage, which regenerates his health much more quickly than he'll lose using Armlet.
Shiva's Guard wards off enemies attacks by reducing their attack speed and when activated, slows their movement and nukes them for large magic damage.
Octarine Core works constantly with your Radiance; making you regenerate life fast in combination with your ultimate: Chemical Rage. The cooldown reduction means Acid Spray can come online even faster and Chemical Rage comes off cooldown even more. Active items also come off cooldown quicky too.
Boots of Travel is essential to an Alchemist who wants to avoid fights, take advantage of Radiance to farm lanes fast and tearing up the jungle. Later on, you can use this to split-push lanes and deal damage with your ultimate and incredible attack speed once you have your other items.
Follow-up with Unstable Conoction with Abyssal Blade. The extended stun duration as well as the increase health-pool will make surviving in fights much easier for Alchemist.
Eye of Skadi slows enemies but also reduces their regen. Especially useful versus high health and regenerative enemies where you need to cripple their survivability from lifesteals and healing.
Stack jungle camps and rely on Battle Fury to regenerate your mana for your ultimate and Acid Spray. Battle Fury cleaves is amplified by your talent tree but also by your incredible attack speed with your ultimate.
Sange & Yasha provides Alchemist with an incredible mix of synergy. The movement speed and attack speed by Yasha helps dish out the damage that Alchemist needs to prevail in fights while the Sange portion amplifies his ultimate's regeneration and reduces disable duration to keep him fighting and outlasting foes.
Monkey King Bar is ideal for users who need additional attack speed and versus evasive heroes either via Butterfly, inherent passive abilities or cause you to miss attacks. Monkey King Bar not only provides strong attack speed but also heightens your ability to your enemies with your attacks.
Nullifier is a key item for you late-game: it slows your target and dispels them. Especially useful against enemies that rely on key passive abilities or items like Ghost Scepter, Eul's, Glimmer, Satanic or Aeon Disk to have them disabled and nullified against you. Hero passive abilities like Windranger 'Windrun' and Monkey King's Jingu Mastery are also nullified by Nullifier.
With Satanic, you have sufficient damage output but need to remain in fights. Satanic gives you more survivability and works great to capitalize on the damage you're dealing to extend fights long enough for you to win them.
The early Urn of Shadows provides not only mana regeneration to help you spam your Acid Spray in lane but can also capitalize on early kills in cooperation with your Position 4.
All of your active abilities are physical, leading to a strong combination with Medallion: 1. Hide somewhere near an enemy or fight 2. Prepare your Unstable Concoction to maximize the damage/duration 3. Blink on your target right before you cast your stun 4. Drop Acid Spray and Medallion on the enemy to maximize your damage