I'm playing a half orc druid, level 4, and I got knocked down a 250 ft pit. I was at full health and have a max HP is 34 life. My first thought was to transform into a Dire Wolf and hopefully mitigate some of the damage I'd take. The Dire Wolf has 37 hp. After my DM rolls the 20d6 he gets a total falling damage of 110, meaning instant death. I however still had my Relentless Endurance left but didn't really know when or where I could've used it to save myself (if even possible) and neither myself or DM could really agree on where to use it. We kind of just ended the session assuming my character was still in free fall and decided we'd discuss it later.
So the question is this: is there any time between reverting from wolf to orc or from orc to dead that I can use Orc's Relentless Endurance to stay alive?
Relentless Endurance. When you are reduced to 0 hit points but not killed outright, you can drop to 1 hit point instead. You can’t use this feature again until you finish a long rest.