How Graves Work

A few useful details about how graves behave on HellHold.
What a grave keeps
All your items — armour, hotbar, inventory and off-hand.
All your XP — you get 100% of your experience back, not the vanilla fraction.
When you collect a grave, your armour is even re-equipped automatically so you are ready to go again.
How long it lasts
A grave stays for 20 minutes before it despawns. That is plenty of time for most trips, but do not dawdle on a long trek back.
If a grave does time out, its contents drop on the ground at that spot rather than vanishing instantly — but they then follow normal item rules and will despawn, so treat 20 minutes as your real deadline.
Collecting it
Walk over the grave for an instant pickup, or
Right-click it to open it and take items out one at a time.
Good to know
Graves work in the Overworld, Nether and End.
Graves are not locked to you — get back promptly, as another player who reaches it first could pick it up.
The golden rule: when you die, drop what you are doing and go get your grave. 20 minutes goes faster than you think.