Mars/Counters

Bad against...

 * Batrider's largely magical damage completely ignores Bulwark.
 * slows turn rate, making it difficult for Mars to control his facing direction for Bulwark.
 * disables Mars whilst enemies re-position themselves behind Mars to avoid Bulwark.
 * allows Batrider to fly over the Arena of Blood's walls.


 * allows Faceless Void to escape or enter Arena Of Blood, and helps him recover from Mars' burst damage.
 * 's magical damage ignores Bulwark.


 * 's magical damage makes it very hard for Mars to stay in the laning stage.
 * 's percentage-based magical damage bypasses Bulwark, and can also be used to jump in or out of Arena Of Blood.


 * deals reliably magic damage during the laning phase against Mars.
 * Lina's ) and combo can interrupt Mars' from being disruptive for a decent amount of time and leave him vulnerable for follow up stuns.
 * deals massive damage and with can deal pure damage too.


 * wastes Arena Of Blood's duration.
 * reduces Mars' tankiness.
 * prevents Mars from following up after his knockback abilities, and takes advantage of his low mobility.


 * Necrophos' largely magical damage completely ignores Bulwark.
 * protects Necrophos from God's Rebuke but more importantly stops Mars from being a threat in lane.


 * 's pure damage ignores Mars' tankiness.
 * can be used to stop Mars from being disruptive or save allies from his abilities.
 * deals high damage to Mars, due to his low intelligence.


 * , and  deals high magical damage and bypasses Bulwark.
 * reduces the amount of abilities Mars can use during fights and has to be careful about his heavy mana cost on Arena Of Blood.
 * Pugna is one of few heroes that can contest Mars' ability to push and defend towers early on.


 * and is very disruptive in teamfights, completely matching Mars' especially since it can all be casted inside Arena Of Blood as well.
 * Firestorm also does percentage based magical damage, a great counter to tanky strength heroes like Mars.
 * Should a fight be going bad for Underlord, he can abandon it with.
 * allows Underlord to lane against Mars' quite reliably since he does not have the best base damage.
 * Underlord is a common carrier of both and, allowing his team to combat Mars ealirer on.


 * Venomancer's poison attacks are all magical damage, ignoring Bulwark.
 * Venomancer's multiple slows are especially effective against Mars' low mobility.
 * can attack through Arena Of Blood.


 * breaks the damage block from Bulwark.
 * and 's slows make it difficult for Mars to contribute to fights.

Others

 * 's forces Mars to look away from Medusa, rendering his Bulwark useless against her.
 * 's and  disrupt fights in Arena Of Blood.
 * Heroes with high magical or pure damage will bypass Bulwark:, , , , , , , ,
 * Heroes with break abilities:, (with )

Items

 * breaks Bulwark.
 * allows heroes to walk freely in and out of Arena Of Blood.

Good against...

 * 's pure damage pierces but her regular attacks do not.
 * Spectre is a hero that cannot have a good game if she is pressured heavily in lane, which is something Mars can do.
 * Spectre can use and  inside and outside from Arena of Blood but it does not matter because Mars' spike comes during the early and mid game.


 * Arena Of Blood blocks out Bloodseeker from attacking a d target.
 * Bulwark helps Mars survive ganks simply by turning towards Bloodseeker without moving.
 * Spear of Mars and God's Rebuke can push Bloodseeker from Ruptured targets.


 * forces Mars to face, causing most of her damage to be blocked by Bulwark.
 * Spear of Mars and God's Rebuke pushes Legion Commander away during Duels against allies.


 * Phantom Assassin's high physical damage is greatly reduced by Bulwark.
 * God's Rebuke has true strike, ignoring the evasion from.


 * Bulwark blocks much of Slark's basic attack damage, even after and during.
 * Slark finds it very difficult to have a good mid game when pressured in the early game by Spear of Mars and God's Rebuke.
 * Should be on cooldown, Slark is very vulnerable inside Blood Of Arena.


 * Bulwark negates most of the physical damage from Terrorblade and his illusions.
 * Mars' AoE abilities kill Terrorblade's illusions quickly.


 * Bulwark negates most of the physical damage from Troll Warlord.


 * Bulwark reduces most of Bristleback physical damage from, what allows Mars to easier kill Bristleback.
 * Mars with his spells, can knock back Bristleback to keep alies alive longer.

Others

 * Physical damage heroes with no disables are vulnerable against Mars:, , , , , , , , , , ,

Works well with...

 * forces enemies to walk into Arena of Blood's walls.


 * can pull escaped enemies back into Arena Of Blood.
 * Arena Of Blood is a good setup for . With, Disruptor can also stop enemies from activating and escaping Arena Of Blood.


 * allows Mars to tank even more damage with Bulwark.
 * Arena Of Blood keeps heroes closer together for more guaranteed bounces.


 * Arena Of Blood prevents enemies from escaping.
 * Arena Of Blood also allows Monkey King to easily gain stacks.


 * Arena Of Blood is a good setup for and.


 * helps with Mars' low mana pool.
 * knocks enemies into Arena of Blood's walls.
 * Arena Of Blood allows Keeper of the Light to easily hit enemies with.


 * and are easy to land against enemies trapped in Arena of Blood.


 * Phoenix can deal huge damages to enemies trap in Arena of Blood with if choose position wisely.
 * can easily heal allies and damage enemies in Arena of Blood from the outside.

Others

 * Heroes with AoE nukes can take advantage of Arena Of Blood:, , , , , , , , , , , ,
 * Heroes who can hit multiple enemies inside Arena Of Blood with their basic attacks:, ,
 * Heroes with fear can cause enemies to run into Arena Of Blood's walls:, , (with level 25 talent)
 * Heroes who need front line/AOE control:, , , ,
 * Heroes who have AoE force-move abilities:, , , (with level 25 talent),

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