Sub-Classics
This Fighter subclass is the simplest one in the game, and as such is often recommended to beginners.
Champion
Magic Missile
1st Level
Human + Elf = ???
Half-elf
This feat allows you to reroll an attack, skill check, or saving throw up to three times per long rest.
Lucky
Because tracking carrying capacity is a chore, one of these magical items will typically fall into the hands of every adventuring party.
Bag of Holding
This Druid subclass allows you to Wild Shape into more powerful forms, as well as to Wild Shape with a Bonus Action instead of an Action.
Circle of the Moon
Lightning Bolt
3rd Level
Human + Red Dragon = ???
Red Half-Dragon
This feat allows you to cast a spell as a reaction instead of making an attack of opportunity, and gives you advantage on Constitution saving throws made to maintain concentration on spells.
War Caster
This magical belt has such useful properties as giving its wearer +2 Constitution, dark vision, resistance against poison damage. It also make its wearer grow a full and glorious beard.
Belt of Dwarvenkind
This wizard subclass, which was first published in the Sword Coast Adventurer's Guide, incorporates swordplay and dance into spellcasting.
Bladesinging
Gate
9th Level
Human + ??? = Air Genasi
Djinni
With this feat, when you hit a target with an attack of opportunity, their speed becomes 0 for the rest of the turn. Also creatures provoke attacks of opportunity from you even if they take the Disengage action.
Sentinel
Snickersnack! This magical sword automatically decapitates a target if you roll a natural 20 (as long as the target doesn't have Legendary Actions). A target that doesn't have or need a head takes an extra 6d8 slashing damage instead.
Vorpal Sword
Artificer is the 13th official 5e class, and the only one released after the 5e Player's Handbook was published. As such, it only has four subclass options to choose from. Alchemist, Armorer, Artillerist, and this subclass.
Battle Smith
Infestation
Cantrip
Human + Succubus = ???
Cambion
This feat grants two cantrips and a single 1st level spell from a spell list of your choice.
Magic Initiate
This magical item comes in many different varieties, including "Absorption," "Mastery," and "Regeneration." When active, it floats in orbit of its user's head.
Ioun Stone
Paladin subclasses are dictated by the Oaths that they swear. "Face hardships with courage, and encourage your allies to face them with you" is a tenet of this Oath.
Oath of Glory
Wristpocket
2nd Level
??? + Glabrezu = Draegloth
Drow
This feat allows you to deliver a speech to up to six friendly creatures over the course of ten minutes, granting them temporary hit points equal to your level plus charisma modifier.
Inspiring Leader
This magical item's name is a pun that riffs on 1981's film, Das Boot.
Doss Lute