~ Imhaa was brought to this universe many years ago unintentionally by Azathoth firing a ball of pure eldritch energy at some sort of primordial wall and accidentally broke it, letting the occupant inside free. Once he was free, he joined the Outer Council, but was soon banished to earth after he attempted mass genocide on the Great Old Ones. 

~ The Supreme Beings and the Celestials tried to lock Imhaa away again by various means, but it never seemed to work. He would simply break back out again almost instantly. 

~ Nobody knows quite how old Imhaa is or how he came to be except maybe the Beyonders, but they refuse to disclose any information on this strange creature. This may be because they are responsible for the creation of this horrendous monster.

~ Imhaa is a master of manipulation and shapeshifting, which allows him to easily manipulate the various entities/organisms that he wants to eat or enslave.

~ Imhaa has his own realm that he calls Steogeogarth Plane. Here he enslaves various beings, stores the souls he collects, and uses an asylum-like setting to eternally torment all occupants of the realm. He uses an asylum because it makes causing his victims to go insane a lot easier.

~ Imhaa will kill/eat his victims 50% of the time, the other 50% being damned to Steogeogarth Plane where they will be driven insane and forced to serve Imhaa for all eternity.

~ Imhaa can create, shape and manipulate electricity, a form of energy resulting from the movement of charged particles (such as electrons or protons), allowing control over electric fields, all charge carriers (Ions, Electrons, Protons, and Positrons), and electronics. He will use this power specifically for... "electroshock therapy" or for tasing/tormenting his victims.

~ Imhaa is a master reality warping, being able to create horrific realities to trap his victims in, make things appear or disappear, alter something as tangible as physics and the universe to something inconceivable like logic,  transmogrifying objects or subjects into something different, and a lot of other fun things.

~ Imhaa is able to go toe-to-toe and even surpass the strongest of beings with nothing but the raw force of his physical blows. Any level of weight he needs to lift or move is irrelevant as his body can emit limitless amount of force that can repel an object of any mass. With this ability, Imhaa could travel massive distances in a single jump, unleash strikes of unparalleled might, obliterate massive life forms with one hit, cause destructive quakes by smashing the ground, shatter planetary systems with his fists, tear through/create space-time anomalies with their strength, etc. It should also be noted that he is immune to all powers that could manipulate, affect or rob him of his strength.

~ Imhaa is able use a form of magic that allows him to cast magical spells related to blood. He is able to use Blood Magic in two ways: to gain access to (esoteric/mystic/magical) blood-based powers/abilities (E.g. Blood Manipulation) or to cast spells that require or are related to blood (E.g. an astral projection spell or healing spell). Imhaa has the inherent power in his blood to manipulate and/or fuel spell-casting. This is an ancient version that predates word-based magic and was considered by some to be more powerful. Blood Magic was a kind of magic based on the employment of blood which is an important component in many rituals, spells and other aspects of the supernatural world.

~ Imhaa's true power level will always be unknown, but if the Outer Council banished him out of fear that he could commit mass genocide on the Great Old Ones, it is fair to say he is pretty damn powerful. Possibly on a beyond cosmic level scale.

~ Imhaa can travel through various means: electrical lines, phone lines, electronics, portals, teleportation, and even just flying there. It all depends on the form he is taking and what he wants to do in that moment.