Dungeon Key?

I'm probably stupid for asking this because I should already know this, but how do you get a dungeon key again after you died in the dungeon? I died in the sand-swept and I need help ;-;.

 

find a key guardian for the dungeon, kill it then bam you got yourself a key.

 

But where? Sorry i thought it probably changed since the update.

 

Key Guardians are found anywhere near the designated dungeon (excluding the Corrupted Dungeons). For example, if you are looking for a Sand Swept Tomb dungeon key, the guardian would most likely be in the desert somewhere. Another example, if you wanted to do Infested Pit, the guardian would be somewhere near or in the Nivla Forest.

 

Thanks for the help, i just found one!