Useful to keep yourself alive, especially if playing a squishy character but you can only use this once per combat, as it refreshes when you roll initiative at the start of combat or finish a rest.There are more feats here for more races and sub-races and most of them are pretty useful. Player's Handbook Buff, Utility

+1 Constitution, gain a cantrip and 1st level spell You awaken the ability to mentally connect with others. Wizard Spells Once you max out your Primary Stat, I do recommend taking the Lucky feat before taking Second Chance. Damage, Combat It’s a shame it doesn’t include an ability bonus but I guess it is enough for balance purposes.Halflings receive 3 feats in this including “bountiful luck” and “second chance”. Gain a Skill and Tool Proficiency, Skill Expertise, and Language

Out of the Abyss Druid Spells It is limited by the fact that you must have advantage to use it but as we all know advantage on an attack is never a guarantee that it will hit and this simply gives you one last chance to land a blow. Due to how often skills are employed I really like this ability. Unearthed Arcana Communication, Psionic Buff, Movement, Racial Feat +1 Charisma, you awaken your psionic potential. Cleric Spells Player's Handbook Player's Handbook

Buff, Combat Eberron: Rising from the Last War

Xanathar's Guide to Everything Unearthed Arcana Buff, Psionic Control, Psionic Wayfinder's Guide to Eberron

Buff, Warding New Player Guide

Player's Handbook

Buff, Combat Player's Handbook You learn the fighting style: Archery Player's Handbook +1 Charisma, learn the spell Darkness and one other 1st-level spell. Ranged weapons mastery - make shots that others find impossible Unearthed Arcana Monster Manual Player's Handbook In this article from Xanathar’s Guide it gives some additional feats for PCs to take based upon their race.Dragonborn players can choose between “Dragon Fear” and “Dragon Hide”. Cleric Xanathar's Guide to Everything Buff, Warding Xanathar's Guide to Everything Combat, Warding Feats 5e This online application will allow you to list and filter all the D&D 5e Feats with severals options.

Player's Handbook Unearthed Arcana

Buff, Psionic Player's Handbook