| Tree Monster | |
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| List of all creatures | |
Tree Monster is a huge living tree which grows in the forests of Third Earth, especially those near the Unicorn Forest. This ferocious flora has a face which is as evil as it's intentions. With the ability to grow and move its branches like a multitude of arms, the Tree Monster grabs any unsuspecting being that passes near it and devours it.
Once while it was trying to feed on a Unicorn, Lion-O came to the rescue of the poor creature and freed it from the Tree Monster's clutches by cutting of the demonic plant's branches with the Sword of Omens.
Appearances[]
| ThunderCats 1980s | ||
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| Creatures & Plants | Frog-Dog | Giant Treetop Spider | Hopper | Sandy Tailed Hooji | Lizarthon | Shadowbeast | Tricorn Elk | Unicorns | Octopoid | Fatatah Cheetah | Dragon | Incubi | Rhino creature | Giant Beetle | Donkey | Giant Scorpion | Mechanosect | Mossland Monster | Yak | Vortex | Great Void | Great Sphinx | Shadow Creature | Feathered Lizard | Arietta Bird | Firebat | Pterodactyl | Snake Birds | Winged Water Snakes | Giant Crow | Vultures | Diamond Beaked Woodpecker | Astral Moat Monster | Black Widow Shark | Gaw-Rak-Rak | Sea-Quines | Tongue-a-Saurus | Berbil Fruit | Trollberry Bushes | Mandroga Flower | Fish Eating Flower | Shemlock | Brackenberries | Tree Monster | 
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| Characters | Good Characters | Evil Characters | Creatures & Plants | |
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| Shows | ThunderCats 1980s | ThunderCats 2011 | SilverHawks | TigerSharks | |