Luna/Counters

Bad against...

 * and both dodge Eclipse.


 * Innate high magic resistance from and long attack range coupled with  makes it difficult for Luna to lane against Huskar or counter Huskar's  effectively.


 * Heavy nuke damage and disables can render Luna completely helpless in fights earlier on.


 * Several damaging nuke spells on low cooldowns. can be used before a fight to harm Luna before she activates her Black King Bar, reducing her survivability for that fight.


 * High nuke damage. can also be upgraded with  to bypass Luna's.

Others

 * Other carries who can chase effectively despite Luna's high movement speed, such as, , and.
 * Heroes that create illusions or other units which can strike unintentionally, such as, , and.
 * However, can mitigate this issue, as long as Luna has high attack damage so she can eliminate them before activating.
 * Heroes with disabling ultimates which can bypass spell immunity, such as, , and.

Items

 * Spell damage mitigation, such as and.
 * Items which allow the enemy to go invisible, such as and.

Good against...

 * can be used to interrupt Black Hole from a safe distance.


 * can be used to interrupt Fiend's Grip from a safe distance.


 * can be used to interrupt Death Ward from a safe distance.


 * can be used to interrupt Rearm or any Tinker's escape attempt from a safe distance.


 * and can be used to help Luna's ally win a Duel, and  can help with Luna with winning Duels herself, should she be targeted.


 * allows Luna to quickly eliminate Nature's Call Treants to mitigate his pushes, granting her farm in the process.


 * Enchantress has a abysmal HP pool and can be killed with.
 * Even if Luna gets under effects of untouchable, she can still spam her and.


 * Spell Immunity that zombies have is an actual disadvantage against Luna since it will strike only Undying.
 * Also with her and  she can destroy Tombstone pretty quickly.

Others

 * Any Low HP hero
 * can be used as a counter-initiation against Blink Dagger dependant initiators such as, , , , ,  (Keep in mind that this strategy can backfire if enemy hero has Blade Mail and/or Black King Bar)
 * Any weak Nuker

Works well with...

 * Combined with, allows Luna and her allies to above-average damage early game, making harassing and kill attempts easier.


 * can greatly improve Luna's attack damage in the late game. Early-game, she can set up kills as well as use on Luna to allow her escape from a sticky situation and potentially save her life.


 * allows Luna to spam Lucent Beams in the early game, as well as slow and disable foes to help chase them down or flee from them.


 * can help Luna pursue enemies and gain more gold from killing them. Additionally, upgrading Eclipse with an Aghanim's Scepter can allow Eclipse to follow an invisible Bounty Hunter, sowing chaos amongst the enemy forces.


 * can allow Luna to build items other than a Black King Bar. Additionally, can help her in one-on-one engagements due to her short range which means she has to get close to attack, and  can allow Luna to fight against enemy carries with little concern.


 * causes day to become night, triggering Night Stalker's for the ten extra seconds of nighttime.
 * gives both of them a very long vision range.

Others

 * Heroes that can help disable foes in the early-game to kill or flee from, such as, , and.
 * Heroes that can silence enemies to keep Luna from getting disabled and nuked down before she has her, such as , , and.
 * Heroes that she can aid in pushing, such as, , and.
 * Heroes to help keep her healthy, especially in the early-game, such as, , and.
 * Heroes that can Gather enemies and stunned them at the same time so that they can't use their skills and use your ultimate like, , and
 * Heroes with invisibility skills (only with )

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