you have swore to dedicate your life to the slaying of the undead, to do so you have learned an ancient technique called "hamon" that uses your breathing to focus the ki that comes from sunlight into your body to gain super-natrual Abilities.

the ripple

starting at 3rd level, you can cast the cantrip druidcraft you can't cast druidcraft if you can't breathe (your dm can state when you can't breathe).

additional spells for the ripple

at 6th level, now you can spend 1 ki point to cast only on yourself either spider climb or water walk as a bonus action without the need to keep concentration. you can't cast either spell if you can't breathe (your dm can state when you can't breathe). either spell immediately ends if you can't breathe or if you drop to 0 hit points.

super-natrual talents

beginning at 3rd level, if you do not already have proficiancies in acrobatics and athletics, gain proficiancy in either one of them. You also have advantage on Intelligence ability checks to recall information about the undead.

unbelievable talents

at 6th level add your wisdom modifier to athletics and acrobatics checks

hamon overdrive

at 3rd level, whenever you hit a creature with unarmed strike, you can make the creature take fire damage equal to your martial arts die plus your wisdom modifier. if the creature is an undead it takes extra fire damage equal to your martial arts die, if it's a vampire on their next turn they do not benefit from their regeneration feature. you can use this feature a number of times equal to your wisdom modifier plus half your proficiency bonus (rounded down), you can spend 1 ki point to gain 1 use of this feature. you regain all the uses of this feature at the end of a short or long rest.

hamon flow shield

at 11th level, when a creature that is within 5 feet of you hits you with an attack you can use your reaction and spend 2 ki points to deal to the creature 3 times your martial die puls your wisdom modifier worth of fire damage. until your next turn add your proficiency bonus to your ac.

the spin