Elves live long lives and adapt to their environment after dwelling there for a long time. Choose one of the following elven heritages at 1st level.
You dwell deep in the frozen north and have gained incredible resilience against cold environments, granting you cold resistance equal to half your level (minimum 1). You treat environmental cold effects as if they were one step less extreme (incredible cold becomes extreme, extreme cold becomes severe, and so on).
You were born or spent many years in underground tunnels or caverns where light is scarce. You gain darkvision.
You have an inborn ability to detect and understand magical phenomena. You can cast the detect magic cantrip as an arcane innate spell at will. A cantrip is heightened to a spell level equal to half your level rounded up.
In addition, you gain a +1 circumstance bonus to checks to Identify Magic and to Decipher Writing of a magical nature. These skill actions typically use the Arcana, Nature, Occultism, or Religion skill.
Your ears are finely tuned, able to detect even the slightest whispers of sound. As long as you can hear normally, you can use the Seek action to sense undetected creatures in a 60-foot cone instead of a 30-foot cone. You also gain a +2 circumstance bonus to locate undetected creatures that you could hear within 30 feet with a Seek action.
You’re adapted to life in the forest or the deep jungle, and you know how to climb trees and use foliage to your advantage. When Climbing trees, vines, and other foliage, you move at half your Speed on a success and at full Speed on a critical success (and you move at full Speed on a success if you have Quick Climb). This doesn’t affect you if you’re using a climb Speed.
You can always use the Take Cover action when you are within forest terrain to gain cover, even if you’re not next to an obstacle you can Take Cover behind.