IN THE CURRENT BETA:
Biome: The Grove
New Mob: Appling - Friendly to players, disliked by 0R4N63.
New Mob: 0R4N63 - Hostile to all.
New Mob: Grove Guardian - Only spawns during the day, attacks all who enter the grove. (Mobs and players.)
New Structure: The Great Tree - Home to the applings.
New Wood: Enchanted Wood - It's so healthy!
New Material: Enchanted Palladium
Biome: Marshmallow Marsh
New Mob: Animated Marshmallow - Hostile, but only because it really wants to be your friend. :)
New Wood: Delicious Wood - It looks so marshmallow-y and delicious.
New Material: Mallow - It's pretty weak, but hey at least it's protection?
Biome: Decayed Valley
New Mob: Drowner - Their bites really hurt!
New Boss: Toxic Factory Employee - Hostile to all who live.
New Structure: Abandoned Factory - What have they done to this beautiful biome?
New Material: Toxic Iron - This may be protecting you from attacks from others but certainly not from the environment.
Biome: Maple Meadows
This biome is meant for ones pleasure. You should want to preserve it. Set up a tent and thrive.
New Mob: Goat - Food source.
New Mob: Deer - Food source.
New Mob: Protector of the Meadows - They don't take kindly to those who enter the meadows.
New Plant: Arnos - Acquire this plant and have some peaceful eats.
New Wood: Maple Wood - Good looking wood, just don't let the Protector of the Meadows catch you with it.
New Wood: Silver Maple Wood - Good looking wood, just don't let the Protector of the Meadows catch you with it.