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Cellular regeneration:Groot has been seemingly killed on three occasions, each time regrowing from a sprig.
Strength: Groot's árvore like form provides him great strength.
Durability: Groot's hide is composed of wood dense enough and durable enough to make him immune to most conventional weapons, including gunfire and fogo which would consume most woods.
Genius Intellect: Groot has received the finest education from Photonic Knowledge of the Arbor Masters. He is highly intelligent and has a tremendous grasp of quasi-dimensional super-positional engineering.
"I am Groot!": Maximus the Mad, Black Bolt's brother, asserted that whenever Groot is saying his trademark "I am Groot!" he has actually been saying any number of things. It is the hardened nature of Groot's larynx that causes people, who are oblivious to the subtle nuances of his speech, to misinterpret him as merely repeating his name.