Wraith Stone
The Wraith Stone is a mystical artifact found by Lara and Amanda in Paraíso, Peru.
Tomb Raider: Legend
Main article: Amanda Evert
While at a dig site in Paraíso, a mysterious entity was killing Lara's colleagues and university peers. Lara finds Amanda in a an open room examining a stone embedded in the wall. Thinking the stone will unlock the door so they can escape, Amanda pulls it from the wall. When she does the mysterious entity disappears and the tomb starts to crumble and flood. As Lara and Amanda make for the exit, some falling rocks land on Amanda's leg, trapping her. As Amanda struggles to free herself, a gate closes on Lara, blocking her path to Amanda. Lara has no choice but to swim away to avoid drowning.
Lara is reunited with Amanda later in Kazakhstan where she confronts her about what happened in Paraiso. Amanda is upset because they didn't go looking for her after the accident. After catching up with Amanda, Lara learns that she harnessed the power of the mysterious entity to escape the tomb. The entity is manifested in the stone that Amanda removed from the wall and now wears around her neck. She has the power to unleash the entity (Fluffy) on her victims. Using the entity, Amanda attempts to prevent Lara from obtaining her fragment of the sword.
Tomb Raider: Underworld
In Underworld the Wraith Stone is recovered from Croft Manor by Lara's doppelganger, and later used by Amanda in Helheim.
Unlike Legend the Wraith Stone does not unleash the Unknown Entity presumably after Lara defeated it in Bolivia Redux, however Eric Lindstrom has stated it was it original form during the development of Legend.