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I know there is already a similar question, but it doesn't really give me an answer. Is there such a thing as a feat or an item that causes enemies to make saving throws like wisdom or general saving throws with disadvantage?

I wanted to create a mage (don't know which class yet) who specializes in CC and spells like Phantasmal Killer, but I don't feel like a high spellcasting mod would really be sufficient to make the CC more reliable.

edit: Based on comments and uncertainties, I would like to say that all ways to increase the likelihood that the spells will apply its effect are helpful. It doesn't have to be a disadvantage. It can also be an effect that increases my spell mod or decreases enemy saveroll as long as it can be used with a mageclass.

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  • \$\begingroup\$ Are you specifically interested in feats and items? Does the effect have to be completely general (ie. any save)? \$\endgroup\$ – Szega May 3 at 18:02
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    \$\begingroup\$ I voted to close because your edit made this incredibly broad. Asking for all things across everything that can increase the likelihood of a spell effect succeeding is too broad for us to answer. \$\endgroup\$ – NautArch May 3 at 22:21
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    \$\begingroup\$ @AxelLP there's some discussion on the site around "list questions" which tend to cause some problems. I think the best entry-point is this meta.rpgse post. The short of it is that a question that generates a bunch of list-item answers (like this one already has) interacts poorly with the voting model. Personally, I can't exactly put my finger on what in your original question caused this to emerge, but that's what close-voters seem to be responding to. (Also, even if the post is closed, the existing answers live on and aren't wasted.) \$\endgroup\$ – nitsua60 May 3 at 22:35
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    \$\begingroup\$ @AxelLP What you are encountering here is a particular way in which an SE site is not a forum, and that is on purpose. This model works best (otherwise, the whole voting thing doesn't work) when what is presented is a well scoped question that addresses a single problem. I see what you are getting at; "how do I make it harder to save versus my {x kind of } spell." If you want this reopened you need to narrow the scope of the question. (And I completely get where you are coming from in terms of casters trying to get the most out of each spell. Then Legendary saves happen and it fails. \$\endgroup\$ – KorvinStarmast May 3 at 23:57
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    \$\begingroup\$ By the way "mageclass" isn't a class in D&D 5e. Pick a class and ask how to do it for that class. \$\endgroup\$ – KorvinStarmast May 4 at 0:00
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The Sorcerer Metamagic: Heightened Spell

When you Cast a Spell that forces a creature to make a saving throw to resist its Effects, you can spend 3 sorcery points to give one target of the spell disadvantage on its first saving throw made against the spell.

That would be the only such feature coming to my mind right now. Of course since it is a metamagic, it is difficult to use as an orientation for creating another class, but at least we can see that it costs a lot of sorcery points just to give a single target disadvantage on a single saving throw. That means the designers valued this effect extremely highly and you should be careful not to give it out too freely when building a class around it.

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  • \$\begingroup\$ Ty thats helpfull, but i didnt mean to homebrew a class or something ;) \$\endgroup\$ – AxelLP May 3 at 18:27
  • \$\begingroup\$ actualy this effect is pretty much what i had in mind! But restricting me to a class kinda sucks :/. Though the best class for my char would may be Wizard. \$\endgroup\$ – AxelLP May 3 at 18:33
  • \$\begingroup\$ Just multi class 3 sorc 17 wizard. Then you still get all the spell slots and 9th level wizard spells and metamagic. \$\endgroup\$ – Sam Lacrumb May 3 at 21:16
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    \$\begingroup\$ @SamLacrumb As far as i know sorcery points increase with the SORCERER lvl and if i get lvl 3 SORCERER and lvl 17 wizard i would only have 3 sorcery points meaning i can use this feature only once per short or long rest idk. \$\endgroup\$ – AxelLP May 3 at 22:56
  • \$\begingroup\$ No you can use a bonus action to trade a spell slots for more. It's worked out well for me so far. \$\endgroup\$ – Sam Lacrumb May 4 at 1:49
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Magical Ambush - Rogue Arcane Trickster

This is a class feature that you gain at Level 9 that imposes disadvantage on spells you cast when hidden from your target.

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  • \$\begingroup\$ Not realy helpfull because i wanted it for a spellcaster and i would not realy call a rouge a spellcaster but thanks anyway! \$\endgroup\$ – AxelLP May 3 at 19:19
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    \$\begingroup\$ @AxelLP An arcane trickster is definitely a spellcaster, and they access the wizard spell list you were looking for. \$\endgroup\$ – NautArch May 3 at 19:33
  • \$\begingroup\$ I never said that im looking for the wizard spell list even though many cc spells are in the wizard list. Also he might be a spellcaster but he still is a rogue and only has up to 4th lvl spell slots and overall does not have much spellslots which would be a problem if i want to focus on cc. Cant blame anyone exept me though because i stated that i wanted to play a spellcaster and didnt say i want a mage so im sorry. \$\endgroup\$ – AxelLP May 3 at 20:13
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Unearthed Arcana: the Mind Sliver cantrip

The Mind Sliver cantrip from the most recent Psionics Unearthed Arcana article is a damaging cantrip that gives the target a 1d4 penalty on the next save it makes before the end of your next turn if it fails its save against the cantrip.

This does involve another spell and require the target to fail a saving throw, but as it's a cantrip, you won't be using up your limited numbers of spell slots on it. It's not disadvantage, but as another mechanic that increases the likelihood of a failed save, it seems relevant enough to mention.

It's available to Sorcerers, Warlocks and Wizards; if you're not playing one of those, the usual cantrip access routes like being a High Elf or taking the Magic Initiate feat would also work.

As noted in the article, this is playtest content, so it's possible your DM won't allow it.

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  • \$\begingroup\$ That's not disadvantage, it's a d4. Same effect as bane which is an official option. \$\endgroup\$ – NautArch May 3 at 19:18
  • \$\begingroup\$ I've edited to make a little clearer why I think this is more relevant than Bane. Still possible it won't meet the OP's requirements, but I think there's a significant enough difference between a resource-free option and a 1st level spell for it to be worth mentioning. \$\endgroup\$ – LizWeir May 3 at 19:20
  • \$\begingroup\$ The bane example was just to show there are other d4 options, but neither are the disadvantage that OP requested. \$\endgroup\$ – NautArch May 3 at 19:32

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