The symbiote Venomhas had a number of different hosts since the alien’s Marvel Comics debut, but Guardians of the Galaxyconfirmed that none were ever as terrifying as Groot. Groot is one of the Marvel Universes most low key over-powered heroes as he has regenerative healing abilities, the power to grow at will as well as control plants, and has superhuman strength and durability. Based on his established power set, Groot proves that he has the capability of becoming a terrifying villain with the Venom symbiote accentuating that fact.
Groot proves himself to be a horrifying Venom host in Guardians of the Galaxy#21 by Brian Michael Bendis and Valerio Schiti. In the issue, Flash Thompson’s Venom has been assigned to the Guardians by the Avengers as Earth’s representative on the team. However, deep space travel is having a strange effect on the Venom symbiote, making it act aggressive as it so desperately wants to get back to Earth. By the end of the issue, Venom jumps from Flash’s body and eventually lands on Groot, giving fans a first look at the terrifying creature that was formed by their bond.
Related: Guardians of the Galaxy's Darkest Moment Redefined Drax's Name
Venomized Groot takes the hero’s core powers and amplifies them with a horror element only a symbiote could capture. Using Groot’s powers of manipulating body size and plant growth, Groot’s Venom grows to an enormous size with large spiky petals surrounding the Venomized face like a mutated carnivorous plant. Groot’s Venom is lean and sharp with symbiote-laced thorns poking out of him from every corner of his body. While Venom Groot is a terrifying sight to behold, as if looking at a Xenomorph on acid, this form is only a glimpse into what the original Groot
Read more on screenrant.com