Bigby began his place in D&D as a powerful evil wizard encountered by the very first players of Dungeons and Dragons, including Gary Gygax himself. Gygax's wizard, Mordenkainen, charmed him and forced him to become his apprentice and servant, until the latter eventually convinced Bigby to abandon his evil ways and become his willing apprentice.
Eventually, Bigby went beyond Mordenkainen's power and left his apprenticeship, becoming the second strongest sorcerer of the time, second only to Mordenkainen himself. He developed a number of spells during this time, most of which focused around his hand and controlling things from afar. Bigby joined Gygax's Circle of Eight, a group of Gygax's own characters which were, at the time, the eight strongest characters in existence.
Bigby was once killed by a warlord empowered by Vecna in the Module Vecna Lives!. He was cloned and returned to life to return to the Circle, now known as the Circle of Five due to the loss of members- Tenser and Otiluke were killed in a treason initiated by Rary, who fled afterwards. Bigby was far too wounded to stop Rary's retreat.
Bigby to this day is one of the most notable characters of D&D and is renowned for even having affected alternate dimensions of D&D, including Forgotten Realms.
Powers and Stats
Tier: At least 5-C, 5-B with prep time, possibly 4-C
Name: Bigby, Wizard of the Eight
Origin: Dungeons and Dragons
Classification: Human Wizard
Powers and Abilities: Superhuman Physical Characteristics, Magic, Telekinesis, Energy Manipulation, Energy Projection, Intangibility, Resurrection, Information Manipulation, Statistics Amplification, Enhanced Senses, Creation, Reality Warping, Forcefield, Illusion Creation, Fire Manipulation, Dimensional Travel, Time Manipulation, Spatial Manipulation, Summoning, Explosion Manipulation, Electricity Manipulation, Earth Manipulation, Spell Resistance, Invisibility, Teleportation, likely many more
Attack Potency: At least Moon level (Comparable to Elminster) Planet level (Laughably above beings capable of casting Wish and he himself can cast the spell with ease), possibly Star level (Battled a form of Iuz on the Primaterial Plane, Iuz should be comparable to the gods that sent a star into the Sea of Fallen Stars)
Lifting Strength: Unknown
Striking Strength: Unknown
Durability: At least Planet level, possibly Star level (Withstood attacks from a weakened avatar of Iuz)
Stamina: Extremely high, can cast spells for an undefined amount of time
Range: At most, planetary
Standard Equipment: Spell Catalyst of some sort, Spellbook, various magical armaments
Intelligence: Super Genius, considered vastly above some demigods with his wealth of knowledge
Weaknesses: Is not immortal, and clones (his form of Resurrection) will not retain any knowledge gained after their creation, having multiple clones causes the clones to fight each other to the death