Is there an item/skill that boost spell damage?

[The Alpha and Omega]

There are weapons that boost attack damage, but there doesn't appear to be any for spells. Increasing intelligence or mana doesn't increase damage.

Also, what's the point of being an DPS Intelligence hero if the damage of your basic attack can be buffed more than your spells?

[Schulti mit Sahne]

Originally posted by The Alpha and Omega:

There are weapons that boost attack damage, but there doesn't appear to be any for spells. Increasing intelligence or mana doesn't increase damage.

Also, what's the point of being an DPS Intelligence hero if the damage of your basic attack can be buffed more than your spells?

Kaya, Veil of discord and Bloodstone.
Also Ethereal blade by reducing the targets magic resistance(allthough its a bit different to spell damage amp, because for example Pure damage is obviously not affected by Magic resistance, also spells that cause physical damage won't work with eblade) and some neutral items I never remember their names lol.

[mephisto]

Reading item descriptions explains items.
How about you do some reading, kiddo?

Your generation relies to much on people telling you obvious things.
Google is your friend. And if it isn't, reading is.
Don't bother other people just because you are to lazy to inform yourself, young man.

[steeeeeeeeeevvee]

Also a couple of neutral items that boost spell damage. You must be a troll or have learning difficulties, these types of items have been in the game for the last couple of updates.

[Dean SpillaBean [#FixTF2]]

I terms of increasing spell damage it mostly comes down to the enemy magic resist, so getting veils or E-blade help with that, but it's difficult to carry with spells alone cause bkbs get bought, making spells almost useless (though some ignore it)

As for dps Int heroes, some of the better ones gain more damage or can be more active the more Int they have. Silencer steals the Int of enemies hit and killed near him, amplifying his glavies damage by a lot. Outworld Destroyer deals a percent of his current mana as damage, while stealing some from enemies through Astral Inprisionment, then deleting anyone with less mana than him with his ult. An odd example would be Tinker, he has insanely powerful and spamy spells, but has to tp back to base to continue doing much, more mana means less down time

If you feel like it, you can check out Dota Buff, they've got an insane amount of infomation on many of the more powerful Int heroes, check for the Mid lane or Core role Int heroes.

Hope this helped!

[HowDareYou]

You sound like you came from LoL. Last year they had it so Intelligence increased spell damage, but now that was canned.

However with the spell amp items, hold ALT and hover over spells to see increase damage numbers.

[Red Field]

There are items that ampliy magic damage... Null Talisman, kaya.. and some others.

[76561199032496168]

Only Bloodstone can do what you're wanting

[Zagryzaec]

You forgot orchid. It deals 30% damage of initial burst unless dispelled. So its usually taken on magic dps heroes to increase their damage.

[steeeeeeeeeevvee]

You can go into demo hero to try out all the items, Null talisman has 3% spell amplification, Kaya 8% amp, Kaya and Sange 16% amp, Bloodstone 8% and can be more depending on charges. Fairy's Trinket 5% amp, Nether Shawl 8% amp, Timeless Relic 15% amp. Also if the items being used are the same for example having 2 Kaya's or a Kaya and a bloodstone(kaya is inside a bloodstone so 2 really) you only get the highest amplification, the spell amp only stack if its say one of each different item. On top of that you can get items that lower enemy magic resistance. Demo hero is great for getting a better understanding of things. And remember to press ult when hovering over the ability icon to show the actual values after the amplification.

[Duchess Minty]

Originally posted by dinotime:

Only Bloodstone can do what you're wanting

Null Talisman, Sange Kaya, Kaya Yasha, and a handful of neutral items disagree.

[Nephalim Glory]

Also, keep in mind that while there aren't a ton of ways to increase spell DAMAGE, there are plenty of ways to increase your overall spell POWER. Cast Range (provided by Aether Lens, several Neutral Items, and many Talents) is a big way to increase your spell output, and Cooldown Reduction (provided by Octarine Core and, again, Neutral Items and Talents) also works, although it's not as common as in LoL. There are also various items (such as Euls' Scepter, Scythe of Vyse and Rod of Atos) that provide an assortment of hard disables (carries usually can't take them without gimping their DPS, so they're perfect for spell cores and greedy supports).

However, there are two big ways to increase spell power in Dota that don't exist in LoL: Aghanim's, and Talents. Aghanim's Shard (cheap, no stats) and Aghanim's Scepter (expensive, provides stats) either grant you a new ability, or upgrade one of your existing ones. What those items do is different for every hero, so there's a lot of room for experimentation. For example, on my favourite hero Ogre Magi, Scepter grants him Unrefined Fireblast (essentially a second use of his stun with a separate CD), while Shard grants him Fire Shield (a buff that reduces incoming attack damage, provides a counterattack, and can be applied to buildings). Talents are the other big one, and are assorted stat buffs or spell upgrades you can take every 5 levels. Carries generally get small stat buffs (+damage, +attack speed, etc.), while casters generally get significant improvements to one of their spells. For example, Venomancer's level 20 and 25 Talents both upgrade his Poison Nova. Level 20 adds 5 seconds of duration (a 33% increase in potential damage over a base of 15), while level 25 adds +640 AoE (since it's a radial nova, that works out to a tripling of the area affected).

Basically, casters in Dota don't directly increase in damage, but they DO increase in utility (greater range, shorter CD's, additional spells, etc.), and while they won't win in raw DPS numbers, a fed 'support' can be a massive nuisance (such as the aforementioned Venomancer applying massive slows and magic damage that cripple the enemy team, or Ogre Magi stunlocking them with Multicast disables).

[Kaled]

Originally posted by mephisto:

Reading item descriptions explains items.
How about you do some reading, kiddo?

Your generation relies to much on people telling you obvious things.
Google is your friend. And if it isn't, reading is.
Don't bother other people just because you are to lazy to inform yourself, young man.

This place is for discussion so stay quiet, no one is forcing you to read this thread.

BTW I googled something similar and found this thread helpful, so thank you OP your question was helpful not only to yourself.