1-4 Goblin Warrens

I'm busy today, so I'm pre-posting this area. 

    

The goblin warrens at 1-3 have exits here. From the  mouth of any of these tunnels there is an unobstructed view into 1-5 and 1-11. Gently rolling hills of glass extend into the "east". To the south you see another large hummock or hill. 

    If the goblin hunting party is driven out of 1-3, they will make their way here, then head south to Goblin Town. If they cannot reach 1-4 and are driven south, they will exit 1-10, move west to 1-11 and enter Goblin Town a bit delayed due to the extra movement. 

    This mostly featureless plain has little to offer in the way of shards. It is close enough to the Goblins' main lair that it is frequently scoured. 

    Amalgams are relatively common, but mostly the small ones. The only reason the larger varieties would come here is to consume their smaller cousins, and the excellent field of view means that it is very hard to get the drop on the little buggers, who simply use their ability to meld into glass as an escape. 

    Of course, it is entirely possible that other creatures appear here - other unfortunates like the PCs who have been stranded. The exposed nature of the plain also makes penumbra attacks likely, particularly during Long Rests. 1 in 3 chance of a penumbra attack during a Short Rest, rising to 4 in 6 during a Long Rest. 

    Oddly, medusae and basilisks are not uncommon here. It must have something to do with the old "mirrors reflecting their gaze back at them" trope. Note that their gaze attacks don't function properly here, so they are a reduced threat, and their parts might serve as loot for an intrepid spellcaster.