A new boss is added to the forest area. He starts showing up after you defeat the Ogre Mama, or you play 20+ games. As you would expect from a golem, he is immune to poison. This one being an Earth Golem makes him also immune to meteors and petrifying. Now, this might seem tough, but he's still a first level boss, so once you learn his attacks it shouldn't be much harder to beat him.
Have fun!