Source: Eberron - Rising from the Last War

• Ability Score Increase. Your Charisma score increases by 1

• Cunning Intuition. Whenever you roll a Dexterity (Stealth) check or a Charisma (Performance) check, roll a d4 and add the number rolled to the total ability check.

• Shape Shadows. You know the Minor Illusion cantrip. Starting at 3rd level, you can also cast the Invisibility spell with this trait. Once you cast either spell with this trait, you can't cast that spell again until you finish a long rest. Charisma is your Spellcasting Ability for these spells.

• Spells of the Mark. If you have the Spellcasting or Pact Magic class features, the spells on the Mark of Shadow Spells table are added to the spell list of your spellcasting class.

Mark of Shadow Spells

Source: Unearthed Arcana 46 - Elf Subraces

The avariel are winged elves. These rare creatures were more common when the worlds of the multiverse were young, but frequent conflicts with dragons much reduced the winged elves’ number. Still, a few colonies persist here and there in the Material Plane and on the Plane of Air.

• Flight. You have a flying speed of 30 feet. To use this speed, you can't be wearing medium or heavy armor.

• Languages. You can speak, read, and write Auran.

Source: Unearthed Arcana 46 - Elf Subraces

The grugach of the world of Greyhawk shun contact with other folk, preferring the solace of the deepest forests and the companionship of wild animals. Even other elves draw their suspicion.

The grugach tend toward chaos and neutrality. They feel no special duty to anyone beyond their own folk and the forest that is their home. Troubles beyond their borders are best kept there. At the same time, they harbor little ambition beyond a peaceful coexistence with nature.

If anyone is fool enough to disturb a grugach realm, these elves take to arms and fight in earnest. Grugach master the basic weapons needed to hunt and forage in the wood. Every copse of trees becomes a sniper's nest, and each forest meadow is an ambush point. The grugach set pits filled with stakes, snares that leave an intruder helpless to grugach arrows, and other snares designed to kill rather than capture. The grugach fight to the death to preserve their realms.

• Ability Score Increase. Your Strength score increases by 1.

• Grugach Weapon Training. You have proficiency with the spear, shortbow, longbow, and net.

• Cantrip. You know one cantrip of your choice from the Druid spell list. Wisdom is your spellcasting ability for it.

• Languages. Unlike other elves, you don't speak, read, or write Common. You instead speak, read, and write Sylvan.

Source: Plane Shift - Kaladesh

Elves who dwell in the forest and countryside are known as the Bishtahar. Most live in isolated communities away from other races, though they still trade with them. In fact, much of Kaladesh’s food supply is grown by elves. Bishtahar cultivators grow food, decorative flowers, wood for building, and elaborate living sculptures in their meandering gardens and fields. They use the plane’s ubiquitous technology to foster the growth of plants and animals, utilizing automatons as gardeners and herders, and employing elaborate, nearly invisible systems controlling heat, water, and nutrients.

Elves who forsake technology entirely are called the Tirahar. Some elves with Tirahar sympathies live within cities or farms, but most simply withdraw to the wilder areas of Kaladesh. No more than one in a hundred elves is counted among the Tirahar, and many members of other races are unaware that these reclusive elves even exist.

• Ability Score Increase. Your Wisdom score increases by 1.

• Elf Weapon Training. You have proficiency with the longsword, shortsword, shortbow, and longbow.

• Fleet of Foot. Your base walking speed increases to 35 feet.

• Mask of the Wild. You can attempt to hide even when you are only lightly obscured by foliage, heavy rain, falling snow, mist, and other natural phenomena.

Source: Plane Shift - Kaladesh

The Vahadar are elves who dwell in the cities of Kaladesh. They are comfortable with technology, and work as planners, architects, aether-seers, or inventors. Some of them use the techniques of Bishtahar cultivators to grow food on rooftops, towers, and greenways. The Vahadar are generally integrated into the rest of society on Kaladesh, living in cities dominated by the other races (though, as in Ghirapur, many of them live in specific garden-like neighborhoods) and engaging in trade.

• Ability Score Increase. Your Wisdom score increases by 1.

• Elf Weapon Training. You have proficiency with the longsword, shortsword, shortbow, and longbow.

• Cantrip. You know one cantrip of your choice from the Druid spell list. Wisdom is your spellcasting ability for it.

• Extra Language. You can speak, read, and write one extra language of your choice.

Source: Plane Shift - Zendikar

Elves are strongly associated with nature, the magic that flows through their forest homes. Their shamans and druids channel this magic of life and growth, communing with the land or the spirits of the departed. Striving to live in harmony with nature, they celebrate the ties between their communities and their connection with the broader world around them.

The elves of Zendikar have much in common with the elves of other worlds. Your elf character has the following traits.

• Ability Score Increase. Your Wisdom score increases by 2. This replaces the standard elf Ability Score Increase presented in the Player’s Handbook
• Subrace. Ancient divides that arose as the elven people migrated across Zendikar resulted in three main elf nations: the Tajuru, the Mul Daya, and the Joraga. Choose one of these subraces.
  • Tajuru Nation
    • The Tajuru nation is the largest of the three main elven nations, concentrated in Murasa and spread across other parts of Zendikar as hundreds of far-flung clans. Tajuru elves are the most open to people of other races, seeing their skills and perspectives as valuable new tools for survival. The Tajuru are also more open to new lifestyles, be it living in a mountaintop citadel or roaming grassy plains.
    • Ability Score Increase. Your Charisma score increases by 1.
    • Skill Versatility. You gain proficiency in any combination of two skills or tools of your choice.
  • Juraga Nation
    • The elves of the imperious Joraga nation of Bala Ged have little respect for any other race of Zendikar— or even for other elves. The survival of their nation and its traditions is the Joraga elves’ only goal, and they view the influence of others as a weakness. The Joraga eschew the goods and habits of others, even avoiding the pathways blazed by the Tajuru when possible. Many view the nomadic Joraga clans as little more than bands of roving murderers, but a complex culture hides behind those clans’ aggressive exterior.
    • Ability Score Increase. Your Dexterity score increases by 1.
    • Elf Weapon Training. You have proficiency with the longsword, shortsword, shortbow, and longbow.
    • Fleet of Foot. Your base walking speed increases to 35 feet.
    • Mask of the Wild. You can attempt to hide even when you are only lightly obscured by foliage, heavy rain, falling snow, mist, and other natural phenomena.
  • Mul Daya Nation
    • Elves of the Mul Daya nation of Bala Ged are set apart from other elves by their relationship with the spirits of their elven ancestors. To the Mul Daya, the spirit world and the mortal realm are different only in terms of their tangibility. Death and the spirits of the dead are as much a part of the lives of the Mul Daya as is the natural world. This is not a macabre sentiment to the elves; they simply view it as the truest sense of the natural order.
    • Mul Daya elves can often be recognized by their face painting and tattooing. Many Mul Daya decorate their skins with an enwrapping vine motif, and make use of poisons and acids collected at great cost from strange creatures and plants in the depths of Kazandu.
    • Ability Score Increase. Your Strength score increases by 1.
    • Superior Darkvision. Your darkvision has a radius of 120 feet.
    • Sunlight Sensitivity. You have disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight when you, the target of your attack, or whatever you are trying to perceive is in direct sunlight.
    • Mul Daya Magic. You know the chill touch cantrip. When you reach 3rd level, you can cast the hex spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the darkness spell once with this trait and regain the ability to do so when you finish a long rest. Wisdom is your spellcasting ability for these spells.
    • Elf Weapon Training. You have proficiency with the longsword, shortsword, shortbow, and longbow.

Source: Unearthed Arcana: Travelers of the Multiverse

Long ago, groups of elves ventured from the Feywild to the Astral Plane to be closer to their gods. Life in the Silver Void has imbued their souls with a spark of divine light. That light manifests as a starry gleam in an astral elf’s eyes.

Because nothing ages in the Astral Plane, astral elves from that plane are thousands of years old, and their longevity gives them an unusual perspective on time. Some are prone to melancholy, while others display an absence of feeling. Many look for creative ways to occupy themselves. Whether they choose to live in quiet contemplation or strike out to explore the reaches of the multiverse, they tend to see things through the lens of time as having little or no meaning to them.

Astral elves who don’t dwell on the Astral Plane can live to be over 750 years old.

• Ability Score Increase. Increase one ability score by 2, and increase a different one by 1.

• Type. You are a Humanoid.

• Speed. Your walking speed is 30 feet

• Astral Fire. You know one of the following cantrips of your choice: dancing lights, light, or sacred flame. Intelligence, Wisdom, or Charisma is your spellcasting ability for it (choose when you select this race).

• Darkvision. You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.

• Fey Ancestry. You have advantage on saving throws you make to avoid or end the charmed condition on yourself.

• Keen Senses. You have proficiency in the Perception skill.

• Radiant Soul. When you succeed on a death save, you can regain a number of hit points equal to your proficiency bonus + your Intelligence, Wisdom, or Charisma modifier(choose when you select this race). You can’t use this trait again until you finish a long rest.

• Trance. You don’t need to sleep, and magic can’t put you to sleep. You can finish a long rest in 4 hours if you spend those hours in a trance like meditation, during which you remain conscious.

• Trance Proficiencies. Whenever you finish a long rest using your Trance trait, you gain two proficiencies, each one with a weapon or a tool of your choice (selected from the “Equipment” chapter of the Player’s Handbook). You mystically acquire these proficiencies by drawing them from shared elven memory, and you retain them until you finish your next long rest.

• Languages. You can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character.