Actually I finally figured it out much later in the game. In the later game I found a temple and after the initial expedition I was instructed to send in a soldier, which continued the quest.
The cultural burden quest actually wants you to clean the debris out of the xenomass, not drain the pond. Taking a cue from the other quest I sent a soldier up and found the option to do so.
This quest needs better directions... I don't recall any indication to use a unit on that tile.
The cultural burden quest actually wants you to clean the debris out of the xenomass, not drain the pond. Taking a cue from the other quest I sent a soldier up and found the option to do so.
This quest needs better directions... I don't recall any indication to use a unit on that tile.