Darkslayers are rangers dedicated to fighting against the terrors of the night. These hunters of undead and lycanthropes eventually become experts at breaking curses as well. Some darkslayers are lone guardians, others are members of elite organizations—such as hunter guilds, religious orders, and families who produce darkslayers generation after generation. Each darkslayer has their own methodology, but almost all use some combination of monster lore, alchemy, magic, and pragmatic tactics.
At 3rd level, you acquire the knowledge to defeat your chosen foes. You gain proficiency in the Arcana, Religion, and Survival skills, and the Mist and Shade combat tradition. If you are already proficient in one of the skills above, you instead gain an expertise die with it. You also learn the altered strike cantrip.
At 7th level, you shrug off the curses of your chosen prey. You are immune to effects that would change your shape or creature type, such as lycanthropy, polymorph effects, and a vampire’s bite. You also gain one of the following features:
Onto Your Tricks. You also have advantage on saves to resist being charmed, compelled, or frightened by your Studied Adversary.
Customized Arsenal. You gain proficiency with up to two rare weapons, and either the poisoner’s kit or the herbalist's kit.
Holy Protection. Once per long rest, you may use the Turn Undead feature as a cleric of your level, but it affects creatures of your Studied Adversary type rather than Undead. (If you have chosen Undead as your studied adversary, it affects them as normal.)
At 11th level you gain proficiency in Wisdom saving throws.
At 15th level you pick up a little magic to help you even the odds. You learn the spells alarm, forbiddance, and gentle repose and may cast them as rituals. You also can cast the spells guards and wards, magic circle, and remove curse once each per long rest without needing a spell slot.