I’ve been tinkering around with some monsters tonight and wanted to share one I just created.
Hit Dice: 2
Armor Class: 7 
Attack: 1 claw (1d6+1) and 2 bites (1d6)
Special: Two heads
Saving Throw: 16
Challenge Level/XP: 3/60
Forest amalgamations occur when stray magical energies corrupt nature. These stray energies have corrupted and twisted a few salamanders and an oak tree, resulting in a man-sized bipedal creature whose body consists of both animated tree and the salamander’s moist and smooth skin. Its two heads, which resemble salamander heads, reduce its chance of being surprised to 1 in 6.
Being an abomination of nature, the forest amalgamation has a hatred for all living creatures and feels compelled to destroy any it comes across.
Forest Amalgamation: HD 2; AC 7; Atk 1 claw (1d6+1) and 2 bites (1d6); Move 12; Save 16; AL C; CL/XP 3/60; Special: Two heads