The third part of the Eberron adventure series that started with Shadows of the Last War and Whispers of the Vampire's Blade.
Designed for a party of 6th level characters.
From the back blurb:
Scramble to Claim a Key to Untold Power
Deep in the jungles of Xen'drik, a relic of great power has lain hidden for thousands of years. Now, determined adventurers race against time and the nefarious agents of the Order of the Emerald Claw to locate the relic, overcome unimagined obstacles, and unlock its ancient secret.