This is a very good adventure. I think it presents the scenario very well, with moments of revelation building and building until the final encounter.

Highs:

• Very good encounter design for the two fights, with good recommendations on how to increase the difficulty.
• Cool story set up, with the plot unfolding well and evenly paced, and leaving plenty of room for the DM to be descriptive.
• The underground jungle is a cool area, and there is lot of room to potentially add additional skill checks and items if you are using the content outside of AL.
• Good enemy variety, especially in that it uses some of the humanoid races out of Volo's that have a lot of potential.
• Lots of replayability to keep things interesting for the DM, especially surrounding the first encounter for the orb, both due to the outcome of the orb (light, dark, flickering) and when the Chitine pack decides to attack.

Lows:

• I think there should be a better hook between the first encounter and the second encounter.
• The DM really needs to play the casters and enemies well for the encounters to be challenging and interesting. A little bit of guidance would be helpful, as it isn't obvious what should be the Turn 1 move for the Choldrith's or Wildlings.
• I felt like I had to railroad one of the groups to not just pursue the VAULT hint immediately, when it is supposed to be part of the sequel rather than this adventure. Some more description on exactly why it isn't feasible to do it now (other than the scouts being near death) might be something to play up when running this.
• The encounters are very back heavy, with very little room for RP between the two of them.
• There is a bit of a burden on the DM on knowing how to treat darkness and limited invisibility, if the orb light source dark. Some suggested DC events between the two encounters, and perhaps a difference to the second encounter based on the lighting, would be nice.