Shadow Demon/Guide

Lane Support/Gank Shadow Demon
This is the most common way to play Shadow Demon. It relies heavily on teamplay as your hero will do very little of the damage himself, serving only as initiator with followed by  (eventually), and huge damage booster for your allies with , using   to scout and chase.

Paired up with/against strong illusion heroes
This is a scenario where you know will do a lot of damage, probably to enemy buildings. This style requires a bit more micro as you will need to control the illusions you're spawning instead of letting them auto-attack whatever.

This style is fully dependent on your and your enemy's team composition. Your best friend in this scenario is as the illusions will dish out colossal amounts of damage while he's in, also being a lot more durable than his own. These images also serve as the perfect target for your disruption, as it can't be used as an initiation against Terrorblade himself.

Other friends include, , , and more. All these heroes are also good targets against enemies.

Since you're maxing out disruption, keep in the mind the cd gets shorter and you'll have more occasions to save your allies lives from a deadly or even a

It's worthwhile to note that, in scenarios where we're maxing last, it can be interesting to ignore the second level of  at level 11. The damage from Demonic purge only increases by 100 per level with no other additional benefits so, if you can get 3 stacks of poison or more on an opponent, the damage from poison actually scales better.

Passive game Shadow Demon
This is a scenario where you'll be stacking and farming the jungle, perhaps because the opponents have escape mechanisms and your team has no real catch/silence, perhaps because both teams have a jungler and you cannot gank theirs by yourself. In this scenario, think long and hard before skilling at level 1 since in most cases, you should prioritize  for your first skill point.

General
In most scenarios, Shadow Demon's combo goes like this: initiate on a lonesome enemy with ; use a to DISABLE HIS BLINK DAGGER should he have one, use  on top of it to amplify his damage taken, use  when he pops out of disruption, laugh maniacally as he dies from illusions of himself hitting him for an unexpected amount of damage, while stacking more poison on him, unless he has an easy way to purge the poison (dark pact, press the attack, repel...) in which case you might as well activate it on every 1-stack, and repeat the purge if you have a scepter.

Disruption, as most banishes, is a very versatile skill, that has this unfortunate flaw it can do more harm than good to your team than good, in the wrong hands.

Like eul's scepter of divinity, it is a perfect setup for unreliable stuns such as Leshrac's split earth,  Lina's Light-Strike-Array or  Kunkka's torrent. Like eul's, it is perfect to waste 2.5 seconds of an opponent's precious buff, such as Dazzle's shallow grave or  Abaddon's Borrowed time.

Unlike eul's, it can be used on allies to save them from opponents' initiation or even their finishing blow. Thus you can save an ally and turn a fight around by banishing him from a predictable Reaper's scythe or even a  Finger of Death or  Laguna blade. The same can be said for Outworld Devourer's Astral Imprisonment. In return, however, and for the same reasons, it can also serve as the perfect initiation tool for the enemy team!

Disruption also creates two very strong illusions of the target, making Shadow Demon very dangerous against illusion based heroes such as Terrorblade and  Phantom Lancer. If the target is an enemy, the illusions will automatically attack it. These same heroes will also work as your best partners when besieging the opponent's high ground at little to no risk. Special mention goes to Centaur warrunner whose illusions benefit from his return passive, damaging the towers for a considerable amount should they (automatically) target the illusions.

Plenty of heroes have an escape mechanism that can render your illusions useless after the disruption (blink, leap, pounce...), if no ally on your team has any follow up stun or silence, you may be better off leaving it at that instead of wasting your mana on extra spells. But you can also control the illusions to target a different opponent, or even push out the lane and farm. In the early game, the illusions spawned can also serve to fully block an opponent that would be trying to hide or juke in the trees, or that would be carelessly walking close to a wall. Hypothetically, you should even be able to fully block an opponent by your lonesome self with just the help of an iron branch: the enemy would be blocked between yourself, two illusions and a temporary tree. You cannot block someone with only yourself plus the illusions and no extra border.

Finally, the illusions can be very useful for heroes that tend to build a lot of auras, most notably a radiance, since your illusions will benefit from it, turning the enemy's radiance against them.

Soul catcher is extremely strong skill at all stages of the game, and arguably Shadow demon's only skill that scales well into the late game. However, it's search radius is fairly large and if you use it in the middle of a creep wave, odds are it won't hit your intended target.

Though it's tempting to always use it after disruption as part of your general combo, always use it by itself when you have any kind of opportunity as it tremendously increases your and your team's damage output and the duration lasts as long as the cooldown anyway.

Shadow Poison is Shadow Demon's only directly damage spell outside of his ultimate and has the potential to deal 1040 damage before reductions when maxed although it does take some time to set up. Shadow poison is at it's strongest in drawn out fights where Shadow Demon can stand in the backlines debilitating his foes with his spells and spam it out. Unlike the rest of his spells Shadow Poison IS DISPELLABLE so keep this in mind versus heroes such as, , or or against heroes that build. Shadow poison will always disable on hit and can do so against enemies in Disruption because of this it is especially good at keeping blink heroes from countering your initiation or push such as, , or. Shadow Poison gives flying vision over it's area during travel time and can be used to deward up cliffs and scout out jukes and ganks.

Be wary if your opponent has a or, as the charges provided by poison will help him sustain in lane and potentially turn a gank around, and poison is very easy to dodge if you keep an eye on shadow demon. However, also remember that an opponent needs vision of you as you're casting the spell to get the charge, and it's well worth a stick charge to cancel a or  as you can do so from a safe distance.

Shadow Poison fully works on invisible heroes, and it can be your safest way to secure a kill without diving a tower. Since the damage doubles on each stack of poison, it's only interesting to keep the stacks on a fleeing opponent (that could potentially heal while you try to chase) if you think you can get at least 3 stacks on him. If you can only get two, it will damage for the same amount as two stacks of one. In lane however, you have a full ten seconds between each stack to try to add them up to 4 or 5, forcing him to run away. If the opponent is melee and tries to go for a last hit, there is your opportunity to add another stack on him.

Though an opponent needs to be extra careless to allow 4-5 stacks of poison to stack up on him, the same can't be said for creeps. In a passive game, you can easily farm the jungle with poison, speeding up the process as you level it. It's also a reliable tool to double or even triple stack certain camps (and farm those stacks too): the poison will activate by itself after ten seconds so you can use it once on a far away camp around :43 so it will aggro you at :53 and stack; use another on a nearby camp that you don't have vision of at :53; and stack the one in front of you with a right click at :55. You can't be too far away from the first camp you're trying to stack or else it will not aggro you when the poison activates, making the whole triple-stack process rather tricky.

Similarly, should you find a bit of space to farm in lane, poison will help you stay behind/safer and farm/push out the lane faster

Demonic Purge is an extremely strong magic immunity piercing skill that is most effective versus heroes that want to be in the midst of a fight with magic immunity such as, , or. In addition to the potent slow, Demonic Purge will live up to its name and remove any friendly buffs placed on the target such as, , , , and a variety of item buffs such as , , and. Aghanim's Scepter grants an enormous increase in potency by giving Shadow Demon a potentially 15 second magic immunity piercing slow and dispel. Aghanim's Scepter also gives Demonic Purge the break debuff which disables enemy passives for the duration of the spell.