The Venom Dwellers have just been released for those of you who have built your Swamp Outpost. According to Kabam, these troops are effective against Stone. So if you are attacking another player who uses Granite Ogres to defend their city, these troops will be very helpful.
The requirements of creating your Serpent Dragon Outpost including owning an Ice Dragon Outpost and a Spectral Ruins. Stay tuned for guides on building all three!