Slardar/Counters

Bad against...

 * applies a basic dispel which can be used to purge, or even Slardar's own.
 * is able to purge off Slardar's and  stun/slow from any allies Oracle chooses to cast it on.
 * can also be cast on Slardar to prevent him from proccing his.


 * Abaddon can cast on any of his allies to immediately purge  and/or the stun and the slow components of.
 * All of Slardar's debuffs are also removed if Abaddon's triggers.


 * Phantom Lancer has a low cooldown basic dispel from, making it hard to keep on him. Can also build  and.
 * Slardar does not do well against illusions and has a low mana pool, making Phantom Lancer with annoying, to say the least.
 * means you can't away from his illusions either, forcing you to Blink,  or get your  cancelled.


 * Slithereen Crush maybe useful for Meepo but Meepo attack more frequently with Geostrike. Some Slardar hasn't build Black King Bar, Earthbind and Poof are enough for kill him.

Others

 * cares less than other heroes about armor reduction, since blocks 60% of all damage without taking armor/magic resistance into consideration. This makes 60% of your  ineffective until Medusa's mana is drained.
 * starts out with and gains a lot of armor from his agility growth. His illusions also make it difficult for Slardar to focus down the real Terrorblade.
 * purges off Haze and stun if bursting him is attempted often leading to Slardar's team being baited into . Also reduces Slardar's already low damage, so Tidehunter stays tanky even against Slardar.
 * Slardar relies on initiation, so any illusion-based hero (especially with ) can scout you out and/or cancel your blink.
 * Illusion heroes like Phantom Lancer, Luna, Arc Warden.

Items

 * Given that Slardar's damage output is entirely physical, there is almost nothing he can do when you activate.
 * provides armor which helps against Slardar, while the passive attack slow also prevents him from attacking as often.
 * ,, , can reduce the value of your  with constant misses and can be hard for Slardar to itemize against, requiring ,  or both. Also true for his allies that want to take advantage of the armor reduction.
 * and can be a pain to deal with until Slardar gets a.

Good against...

 * Invisible and fragile. With  no longer capable of dispelling  Riki lacks a good option against Slardar: Riki will not win most straight-up fights even without being stunned, and doesn't have nearly enough health or armor to survive being focused on with Corrosive Haze.  Slardar's  is usually enough to chase effectively, and even Riki's ultimate  will rarely deal enough damage to matter much against Slardar.  If you find yourself in this untenable position it is recommended to use  aggressively or have a support interfere with Slardar.


 * Clinkz is fragile, and relies on to escape from battles quickly.  grants True Sight on Clinkz, making his invisibility useless, and makes him even more squishy for the time being. Do not underestimate Clinkz however, as late game, Clinkz can tear down most heroes with  and  along with  which is commonly built by Clinkz.


 * Bounty Hunter's is rendered useless with  and makes Bounty Hunter an easy target for Slardar and his team.


 * Weaver relies on to escape and kite enemy heroes. Slardar's  reveals Weaver, who is already a very frail target.
 * Weaver usually builds, can be used to "pop" the spell block of , letting Allied heroes use their abilities on Weaver.


 * Shadow Fiend, a normal builder often relies on it's invisibility to escape fights.  reveals Shadow Fiend and also weakens his already low armor.


 * With armor items like  or  combined with, Slardar can easily tank the , If not dueled himself, he can drop 's armor during duel and/or buff his teammate and save them, leaving her only the choice of dueling supports which can also be saved with fast Blink into.

Others

 * 's can be countered, however,  could also use abilities like  or  to escape by other means.
 * 's can be revealed easily by
 * 's can be interrupted with, and 's invisiblity is useless when Slardar uses.
 * 's already low armor and easily interruptible ultimate, can make Slardar her worst nightmare.  also often builds  which is revealed by.
 * 's ultimate makes her and all her allies invisible for a duration.  reveals invisiblity, making  useless.
 * because has shorter cooldown than Spellblock 8 seconds (13-5).
 * Slardar's is Physical so Black King Bar won't prevent the Bash.
 * as reveals her while in.

Works well with...

 * Corrosive Haze significantly increases the damage from Jinada.


 * Double armor reduction leads to the enemy having little to no armor in lane.


 * Presence of Dark Lord further reduces the armor.


 * Combined with Alchemist's further armor reduction with acid spray and given the fact that his unstable concoction deals physical damage


 * Slardar makes a great infest taxi for Lifestealer which in synergy with Lifestealer's slows and Slardar's lock down and armor reduction any hero is a dead one by this infest bomb

Others

 * Elder Titan bringing enemy base armor to 0 which always forces the enemy to have minus armor
 * Phantom Assassin with the heavy physical damage given by her critical is insane in combination with Slardar
 * Anti-mage's mana break deals physical damage so in conjuction with Slardar's armor reduction everyone becomes squishy for Anti-mage
 * Basically any heavy-physical damage right-clicker for instance Chaos Knight, Sven, Juggernaut, Drow Ranger, Morphling, Ursa and so on
 * Templar Assassin and Weaver given they're both physical damage carries and have armor reduction spells as well as desolator being a core item on both

List of heroes that counter Slardar, and list of heroes that work well with Slardar.