Swamp key

Swamp key is an item found in Valheim.
==Availability==
*Dropped from The Elder in the Black Forest.
==Usage==
The Swamp Key is used to unlock Sunken Crypts inside the Swamp. It must be in the player's inventory the first time each crypt gate is opened, but is no longer needed to re-enter the same crypt. It can be used an unlimited amount of times.
uk:Болотяний ключ
ru:Болотный ключ
cs:Klíč z bažin
de:Sumpfiger Schlüssel
fr:Clé des cryptes