By the In-Betweener's own admission, he represents
duality itself, specifically in respect to concepts such as good and evil, reason and emotion, truth and illusion, and life and death. The In-Betweener is also an agent of the conceptual beings
Master Order and
Lord Chaos, although his loyalty is usually to himself rather than to them.
Adam Warlock encounters the In-Betweener, who reveals that it is destined to force Warlock to transform into his villainous future self the
Magus. The In-Betweener then claims to be the power behind the plan to alter the fabric of reality orchestrated by the group of sorcerers known as the
Creators, but secretly seeks to impose his own concept of balance upon the universe. After an encounter with the sorcerer
Doctor Strange, the In-Betweener is imprisoned as punishment for rebelling against his masters. The In-Betweener later attempts to supplant Galactus' role in the universe and allies with the
Elders of the Universe in their plan against Galactus. However, the In-Betweener betrays the Elders during a confrontation with the entity
Death and compels Death to wipe three of the Elders from existence. Soon after this, the In-Betweener also battles Galactus and his robotic servant the Punisher, but the stalemated battle is interrupted by his masters, who subsequently imprison him. During the
Time Runs Out storyline, the
Beyonders are revealed to have killed Master Order, Lord Chaos and the In-Betweener as part of destroying abstract entities in each reality across the multiverse. The In-Betweener is later revealed to be the mastermind behind
Libra's attempt at destroying Earth, and more specifically,
Starbrand. Not long after the universe was restored, Master Order and Lord Chaos took advantage of the fact that the cosmic hierarchy was not set anew and apparently kill the
Living Tribunal. After committing the murder, they approach the In-Betweener and force him to fuse them into a new cosmic being named Logos in order to take the Living Tribunal's place as the personification of multiversal law. ==Powers and abilities==