Based off of the nomads from Curse of Strahd which were expanded on in Van Richten's Guide to Ravenloft, I have created a racial variant of the Human for players who want to make a character which has some experience with traveling the Mists. Given their experience and exposure to the supernatural, they have access to certain senses and abilities a normal human would not. 

Vistana (Human Variant)

 

Ability Score Increase

When you choose this variant, instead of increasing all of your ability scores by 1, choose two different scores and increase each by 1.

 

Nomad

The vistani generally form small tribes in the form of caravans which travel across the countryside. You are proficient with land vehicles and gain proficiency with one instrument or one gaming set of your choice.

You also gain proficiency in one of the following skills of your choice: Insight, Performance, or Survival.

 

Sixth Sense 

As a traveler of the Mists, you have an acute awareness of the dark forces of the Shadowfell. As an action, you can focus this sense on the area around you. Until the end of your next turn, you know the location of any undead within 60 feet of you that is not behind total cover. For a creature you sense using this feature, you do not learn its identity but can sense whether its CR (or level when applicable) is higher or lower than your level.  

This feature also reveals whether any creatures or objects within 60 feet that are not behind total cover bear a curse, although it does not reveal what the curse is. Once you use this feature, you cannot use it again until you finish a short or long rest. 

 

Evil Eye

As travelers in foreign lands, the vistani are always on guard against those who want to persecute or take advantage of them. The “Evil Eye”, as it has come to be known, represents arcane skills developed by the vistani to bring misfortune to those who seek to harm them. You learn the Vicious Mockery cantrip. Starting at 5th level, you can cast Bestow Curse as a 3rd-level spell once using this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting modifier for spells cast using this feature. 

When you cast Bestow Curse using this feature, you can choose one of the following in addition to the curse options available to you through the spell:

• The target loses one non-magical item of your choice in its possession. The item vanishes to an extradimensional space for the duration of the spell. 
• The target becomes unable to drink alcohol, as any which passes their lips becomes water instead. If you maintain the spell for its full duration, have the target make an additional Wisdom saving throw. On a failed save this curse effect becomes permanent for that creature and lasts indefinitely or until the target is targeted by the Remove Curse spell. 

Variant Feature: Prescience 

This feature replaces Evil Eye if taken

There are some among the vistani who are gifted with the ability to read fortunes and see brief glimpses of the future. You gain a Tarokka Deck and gain proficiency with playing cards. If you gain the Spellcasting or Pact Magic feature as part of your chosen class or subclass, you can use your Tarokka Deck as a spellcasting focus for casting your spells. 

You learn the Guidance cantrip. Starting at 3rd level you are able to cast Augury as a ritual. At 7th level, you are able to cast Divination as a ritual as well. Once per day, when you cast one of the spells granted by this feature as a ritual you can ignore the spell’s material component provided you are holding your Tarokka Deck. Charisma is your spellcasting modifier for spells cast using this feature.