Tanglegate is an elf gate in the demon-corrupted forest of Tanglebriar. It can be reached via Lichgate, which is the only known example of a working elf gate that links to Tanglebriar. It's portal key is a sapphire.
Treerazer, the lord of Tanglebriar, hopes one day to be able to use Tanglegate against the elves, so has ensured his minions have not destroyed it. The gate itself is a stone arch covered in moss, and stands on a rare patch of dry ground in the middle of a stinking bog.