This will be a ridiculous amount of feats that was shown on SCP 682's profile:
Can survive being constantly submerged in hydrochloric acid.
After being exposed to SCP-409, became immune to being crystallized. Became immune to SCP-689 by gaining the ability to die and revive at will.
Resisted being absorbed by SCP-017, a living shadow that can absorb anything, being placed into its stomach.
Resisted being mind controlled by SCP-061, then absorbed its powers and used them to breach containment.
Tests involving SCP-123 were rejected because 682 could potentially have absorbed it.
During an interaction with SCP-173 it developed omnidirectional vision and eye caps that could deflect high-caliber sniper rounds In one experiment, it was cut into perfectly equal pieces with a laser. Each piece then regenerated into a separate 682 with a separate conscience and developed skin that could reflect the laser. After one was severely damaged by security personnel, the other absorbed it and became a single being.
The Foundation used SCP-826, a set of magic bookends that made any literature between them into reality, to make a story tilted "The Generally Nice, Friendly Thing That Can And Will Kill SCP―682 Permanently if it So Much As Spots That Damn Lizard" real. After sending 682 into the story, the story was soon re-titled "The Generally Nice, Friendly Thing That Tried To Kill SCP―682 Permanently But Failed" and had a new chapter detailing an epic battle between the two, which 682 won handily.
After having 21% of its mass consumed by ants produced by SCP-743, it grew an anteater-like tongue and consumed the ants, regenerating twice as fast as normal.
After being exposed to SCP-063, gained the ability to change its biological makeup from organic to inorganic, and vice versa, at will.
Could not be killed by SCP-662.
Stated that a 60 Megaton Thermonuclear Bomb wouldn't kill it
Stated by SCP-738, who can make virtually anything happen for a certain price, that it would be impossible to destroy 682 without seriously damaging or destroying the universe.
After being exposed to and severely damaged by SCP-272, a nail that embeds itself in a person's shadow and limits them to movement inside said shadow, evolved luminescence from its skull.
SCP-343 refused to kill him.
After being exposed to SCP-536 gained the ability to restructure its body to resist extreme radiation, extreme changes in the laws of physics and the fundamental forces, and being instantly accelerated to the speed of light. It was then reduced to nothing but quarks and was able to regenerate. It found the entire experience enjoyable.
Bone structure is immune to the mucus of SCP-811, which can melt a full-grown man in seconds. Became completely immune to it after exposure.
Regenerated from being reality-warped into a housecat by SCP-1237
Resisted being absorbed by, and instead took control of, SCP-1361.
Survived ingesting 200L of bodily fluids from SCP-1933, 26mL or more of which will instantly transform any matter it comes in contact with into Irish Cream.
Was able to absorb SCP-513's powers and used them to breach containment by creating site-wide illusionary copies of itself to create mass hysteria and kill 67% of site staff and 45% of site D-class personnel. All of this was done while it was asleep.
After being exposed to SCP-999 it gained the ability to unleash an unidentifiable wave of energy from its body which caused anyone within the wave's range to collapse into crippling fits of laughter, allowing SCP-682 to escape and slaughter them.
Was able to return to the Foundation after being "traded" into SCP-702's pocket dimension
Was able to return to the Foundation after being taken into an alternate universe by SCP-507
Ingested a kilogram of heroin and a liter of cyanide and only suffered a 45 minute heart attack, then consumed two more of each with no ill effects.
Killed the head of an experiment, by broken neck caused by blunt force trauma against a control panel, despite remaining in the testing area.
Immune to SCP-2140, which instantly rewrites the past of whatever comes in visual contact with it.
Resisted being possessed by Dr. Bright using SCP-963.
Dr. Gears stated that: "SCP-682 is not, in any way, a biological entity as we understand biology. It is a…thing, which has somehow formed a "shell" or "growth" that we have numbered SCP-682. What it is, I have no idea, but I doubt it normally has a form we would call "corporeal". Anything dealing with normal biological processes does not count with 682. Hurting it is like shaving the hair off a human: annoying, but not deadly. Time, space, and states of matter must function VERY differently where ever this thing is from, and it is functioning on those rules, not ours. It's like playing checkers against someone playing chess. it's the same board, but the rules and the pieces are totally different."