Spectral Elves (5e Subrace)
From D&D Wiki
A lineage of elves practicing the art of connecting to spirits and utilising them as their tools, using esoteric arcane means to achieve such heights, however such a conquest would forever be in vain as soon the blood of every elf in that lineage would become corrupted, slowly evolving themselves into the very beings they wished to subjugate through strange and unknown means. As part of that blood line strange blood flows through your veins.
Ability Score Increase. Your charisma score increases by 1.
Spectral Embodiment. Having a body akin to a ghost you also possess some abilities akin to it. You no longer suffer from the effects of exhaustion and are immune to the poisoned condition.
Afterlife Lifeline. Being somewhat connected to the afterlife in a way its essence seeps through your body, causing your physiology to change slightly, your heart rate is slow and your temperature is rather cold. Your creature type counts as undead as well.
Spectral Hover. You count as one size smaller when determining your carrying capacity and the weight you can push, drag, or lift. You float a few feet above the ground. This allows you to ignore most forms of difficult terrain and makes you immune to being knocked prone. However, you can float no higher than 5 feet and when you are reduced to 0 hit points you stop hovering. You hover over large holes or gaps in terrain smaller than 5 by 5 feet wide.