I got "Teleport crystal (1)" twice from the Elf Warriors in Lletya. It's not on the drop table.[edit source]
I had a slayer task of 59 Elves, I did them all in Lletya. I got two of the Teleport crystal (1). Both came from the Elf Warrior on the west side of the town that spawns near the Elf Archer.
22:46, 4 April 2020 (UTC)