You have Darkvision with a range of 120 feet.

When you finish a long rest, roll one d20 and record the number. Once before your next long rest, you can replace an attack roll, saving throw, or ability check made by you or a creature you can see within 30 feet with that number.

You decide to use this feature after the roll, but before the DM determines the outcome.

You can sense when death has recently touched a place. As an action, you can open your awareness to lingering souls. For 1 minute, you know if a creature has died within 30 feet of you in the past 24 hours and the direction of its remains. You can use this feature once per short or long rest.