Heroes:
- Abaddon can deny himself with Mist Coil.
- Axe's Culling Blade and Ancient Apparitions ultimate go through Dazzle's Shallow Grave.
- Axe's Berskerer's Taunt works through magic immunity.
- Beastmaster's boars can slow heroes through magic immunity.
- Bloodseeker's Blood Rage cannot be dispelled. If you cast it on a hero before they pop magic immunity, they will still be silenced.
- Bounty Hunter can deal bonus Shadow Walk damage twice with a single cast. You can attack during the fade time to get free bonus damage without cancelling the invisibility, and then attack again to remove your invisibility.
- Centaur Warrunner's Double Edge has a small AoE. Once you have good health regen you can actually use this to farm creeps.
- Centaur Warrunner's Return works on towers as well (it will deal damage to them when they attack him).
- Razor's Static Link (draining damage) works through magic immunity.
- Silencer's ultimate interrupts channeling spells (e.g. Pudge's Dismember or Enigma's Black Hole).
- Death Prophet's spirits deal physical damage (and are reduced by armor) but are unaffected by damage block from shields.
- Disruptor's Glimpse at level 4 has 1800 range, as far as you can see in daytime.
- Enchantress' Nature's Attendants will heal through BKB, and will continue after she dies (staying in the place where she fell until the end of the duration).
- Ezalor's (Keeper of the Light) Mana Leak will instantly stun Lone Druid's bear since it has no mana already.
- Ezalor's Mana Leak will not work on Blink or teleport abilities (very fast movement in under 0.1 seconds will not drain mana).
- Faceless Void
- Backtrack is not considered evasion so MKB does not work.
- When in Chronosphere, evasion is not possible.
- Invoker's Tornado dispels many buffs (e.g. Drum of Endurance, Empower).
- Juggernaut
- You can attack during Blade Fury...
- Against magic immune targets, it does full damage
- Against magic vulnerable targets, it does no damage but can still apply attack modifiers (like maim)
- His Healing Ward moves at an incredibly fast 450 move speed.
- Omnislash
- Goes through magic immunity and Linken's sphere (Linkens will block one attack but not the ministun on first hit)
- You can attack during omnislash, but must manually target enemies (and be next to them)
- Kills creeps in one unit (non-player controlled or ancients)
- Does not target Undying's Tombstone zombies
- Leshrac's Diabolic Edict at max level, when used against a single target, does 200 damage per second for eight seconds and can hit invisible and magic immune units as well.
- Lina and Lion's ultimates can be disjointed. You have a .25s interval between the animation and the damage to avoid it (e.g. with blink).
- Lion, Shadow Shaman and Scythe of Vyse all hex enemies into different animals.
- Luna's Eclipse ultimate will turn day into night while it is active (between 1.8 and 5.4 seconds, depending on level). Note that she has full vision at night as long as she has at least one level in Lunar Blessing.
- Omniknight's Guardian Angel (physical invulnerability) and Repel (magic invulnerability) can be purged.
- Silencer's Glaives of Wisdom do not work on Visage's gargoyles.
- Silencer's ultimate Global Silence will work through magic immunity, but can be removed by activating BKB after it has already been casted.
- Sniper's Headshot, when it triggers, will ALWAYS hit. It will bypass any kind of evasion (e.g. Windrun, uphill miss chance).
- Spectre
- Dispersion...
- damage does not put blink dagger on cooldown
- only deals damage between 300 and 1000 units (the closer you are the more damage you take). Thus if you are closer than 300 or farther than 1000 you take no damage.
- Haunt can be used on any illusion you have, such as from Manta Style and the Illusion rune.
- Sven's ultimate, God's Strength, cannot be purged.
- Terrorblade
- ...has the highest starting armor in the game of 7.08. Visage, Phoenix and Io all have negative starting armor values.
- ...can sunder his own illusions.
- Tidehunter's Anchor Smash's damage and debuff (-60% damage) goes through BKB. Activating BKB will also not remove it (though purging will).
- Timbersaw can cast and use items normally after he fires Timberchain. This includes using Whilring Death and Chakram, but you can also activate a teleport scroll and it will keep channeling even while being pulled.
- Undying's Tombstone will continue spawning zombies even while enemies are slept by Naga Siren's ultimate. You can stack quite a few zombies this way before releasing the song.
- Ursa's Overpower cannot be purged, but his ultimate (Enrage) can be.
- Viper's Corrosive Skin triggers on many interesting effects. For example, Corrosive Skin will be triggered by Centaur Warrunner's "Return" passive, applying your passive to him every time you attack.
- Phoenix
- Can fly over Earthshaker's Fissure with his slow movement while Sun Ray is on.
- If Phoenix activates Blade Mail before using his ultimate, whoever kills the Supernova will take reflection damage based on Phoenix's health before he used his ultimate.
- Phoenix can be denied by teammates while in Supernova and under 50% health.
- Venomancer
- Poison Gale has the longest slow in the game at 15 seconds. This makes Venomancer an excellent lane partner with Dark Seer, who can easily use ion shell to get kills.
- Poison Gale does 25 total damage at level 1, but 200 damage at level 2.
- Poison Sting does not dispel healing or prevent blinking.
- Poison Sting goes through BKB.
- Viper's Corrosive Skin works globally when a DoT is placed on him (e.g. Phoenix's Flame Spirits), damaging the enemy even when they're not around anymore.
- Viper's ultimate slows through magic immunity (including Naix Rage and BKB).
- All heroes have the same day sight range (1800) except for two: Batrider and Night Stalker, who have 1200.
- All heroes have the same night sight range (800) except for four: Night Stalker and Slark (1800), and Sniper and Bounty Hunter (1000). Luna also gets 1800 night vision, but only after she gets a level in Lunar Blessing.
- At level 16, Dragon Knight has 20.5 armor with no items. This makes him excellent against any hero that relies on armor reduction for damage.
Items:
- You can only use Blink dagger in the direction you are facing. Trying to use it behind yourself will force you to turn before blinking. View the forum post on this here (originally about Puck's Phase Shift + blink).
- It costs more to build a Dagon to level 5 than a Divine Rapier.
- Black King Bar can be repurchased from scratch to reset the cooldown (you should probably sell your old one).
- Desolator applies to buildings as well as heroes. Also, the armor debuff is applied BEFORE your attack lands, meaning that even your first attack benefits from the -armor.
- Magic Stick and Magic Wand only gain charges from visible enemies within 1200 units. Enemies casting from the fog of war or while invisible do not add to your charges.
- Mjollnir pops its damage every tick when you're being damaged by Phoenix's Fire Spirits, which can add up to quite a lot of damage.
- Monkey King Bar bypasses all evasion, including smoke screen from Riki, Windrun from Windranger, and uphill miss chance.
- Necronomicon minions have extremely fast attack speeds. The warrior's base attack time is .75 and the archer's is 1.0. Compare that to Anti-Mage at 1.45, who has the fastest unbuffed hero attack speed in the game.
- Linken's Sphere can be casted on a teammate to give them the same protection temporarily.
- You can activate Shiva's Guard, then blink, and the frost radius will follow you. Very effective if you wait till it's mostly expanded before blinking.
- The Cheese that drops every time from Roshan on and after his 3rd death can be sold for 750 gold.
- Couriers can hold Smoke of Deceit and use it (it does not make them invisible but will work on nearby friendly heroes).
- Manta Style activation removes Dust of Appearance.
- Orb of Venom and Skadi both slow someone who is magic immune from Black King Bar.
- Smoke of Deceit
- will hide heroes from the minimap, even if they are visible from a sentry ward.
- will not be removed by illusions of heroes
- Vanguard does not block damage from Serpent or Plague Wards.
- You cannot queue (shift click) items or abilities that are on cooldown.
