Languages
You know Common, Abyssal, and Infernal.
Tough
Your hit points increase by 2 times your current player level when you pick this feat. And increases by two for each level after that.
Master Of Evil
As a slayer, you have a decent working knowledge of your mark, from experience and research, you know their natural strengths, weaknesses, and habits. Sure, the occasional unique, random, or oddball may throw you for a loop, but a standard mark will rarely take you by surprise, and the indications of their presence stand out to you like a sore thumb. You likely have a reputation from your past career, and whether it is good or bad, people know you are a slayer, and that you have survived at least this long. People are likely to come to you with jobs to deal with a threat they believe is in your area of expertise. Now, most people are pretty ignorant about the supernatural dangers of the world, so they are often wrong, but even so much as telling them it's something else may be enough to calm their fears. (Unless it's something worse. Nobody wants to know the ghost in the basement is actually seven liches summoning a demonic prince.)
Furthermore, because you are an expert on the subject, people are more likely to believe you when you make assertions about it. (When a vampire slayer shouts, "Get outside NOW! You'll be safer in the sunlight!" you tend to listen to him.) Being an expert, people who fear your mark are likely to feel reassured and secure in your presence, making it easier to find shelter and allies in places facing a threat from your mark.
Favored Enemy (Fiends)
You have +2 bonuses to damage rolls against Fiends. Additionally, you have advantage on Wisdom (Survival) checks made to track your favored enemies as well as Intelligence checks to recall information about them. When you gain this language you also learn to speak one language of your choice.
Natural Explorer
You are a master of navigating the natural world, and you react with swift and decisive action when attacked. This grants you the following benefits:
• You ignore difficult terrain.
• You have advantage on initiative rolls.
• On your first turn during combat, you have advantage on attack rolls against creatures that have not yet acted.
In addition, you are skilled at navigating the wilderness. You gain the following benefits when traveling for an hour or more:
• Difficult terrain doesn’t slow your group’s travel.
• Your group can’t become lost except by magical means.
• Even when you are engaged in another activity while traveling (such as foraging, navigating, or tracking), your remain alert to danger.
• If you are traveling alone, you can move stealthily at a normal pace.
• When you forage, you find twice as much food as you normally would.
• While tracking other creatures, you also learn their exact number, their sizes, and how long ago they passed through the area.
Features & Traits