Enter the tomb to find a tall, square pillar with spikes and something shiny on top.
Have Lara stand on the pressure pad to retract the spikes around the top of the column. While she's doing this, have Totec throw 2 spears into the pillar—one from the stairs and one at ground level.
Then switch places so Totec is standing on the pad to keep the spikes retracted, and have Lara climb the spears to reach a Clay Owl Artifact (+ defense, - bomb). Exit the way you came.
[Return to the Temple Grounds Co-op Walkthrough]