Master Order is a fictional character appearing in American comic books published by Marvel Comics.
The character first appeared in Marvel Two-In-One Annual #2 (1977), and was created by Jim Starlin.
The entity embodies order and balance in the universe and is the opposing force to "brother" entity Lord Chaos. The pair are rarely seen, but appear to manipulate events to prompt Spider-Man to solicit the Thing to join the Avengers and Warlock in the first war against the Titan Thanos and defeat him. Master Order and Lord Chaos were then seen observing King of the Norse Gods Odin and master villain Dormammu play a cosmic game of chess. Master Order and Lord Chaos next conspired with other metaphysical and "omnipotent" beings against the Beyonder. Lord Chaos and Master Order were then summoned by the Silver Surfer to regain control over their servant the In-Betweener. They imprisoned the In-Betweener for his transgressions. Master Order and Lord Chaos also attend the funeral of Eon and speak with cosmic hero Quasar.
Master Order and Lord Chaos participated in the congress of metaphysical and abstract beings to determine Thanos' fitness to wield the Infinity Gauntlet. They choose to join Adam Warlock and the other cosmic deities in a bid to stop Thanos. With the other abstract beings, they battled Thanos, and then battled Nebula when she obtained the Gauntlet from Thanos. The congress of abstract beings then witnessed Adam Warlock's cosmic trial to determine his worthiness to wield the Infinity Gauntlet. Lord Chaos and Master Order were next seen among a group of abstract beings questioning the Beyonder from the Dimension of Manifestations.
During the Time Runs Out storyline, the Beyonders are revealed to have killed Lord Chaos, Master Order, and the In-Betweener as part of destroying abstract entities in each reality across the multiverse.
Following the restoration of the universe after the Secret Wars, Master Order and his "brother" became disgruntled by Galactus' evolution from a force of destruction to a force of creation. They eventually put Galactus on trial before the Living Tribunal. The Tribunal ruled in Galactus' favor and allowed him to remain in his new form, claiming that the universe being in a new iteration meant the cosmic hierarchy wasn't established anew. Master Order and Lord Chaos took this council to heart, and murdered the Tribunal in order to take his place as the personification of multiversal law.
They attempted to turn Galactus back to his world-devourer form. However, for the same reason Order and Chaos could kill the Living Tribunal, they couldn't stop Galactus from fighting back his transformation. If there wasn't a heriarchy yet, it meant Galactus was also on the same level as Order and Chaos, so they couldn't impose their will on him. Because of this, Order and Chaos traveled to their servant, the In-Betweener, and forced him to become the uniting force in a fusion that combined Master Order and Lord Chaos into a single being, the self-proclaimed new order, Logos.
Master Order is an abstract being who embodies the metaphysical concept of Order; as such it has no physical form, although on occasion it has manifested as an image of a disembodied bald male head.
It has been implied that Master Order, and its counterpart, Lord Chaos, have vast powers which they use to manipulate events within their sphere of influence in subtle ways. It is known that, through some as yet unknown process, Master Order and Lord Chaos worked together to create the metaphysical being known as the In-Betweener.
Thanos wielding the Infinity Gauntlet ranked Master Order's scale of power as above that of Galactus, but below that of Eternity.
Master Order and Lord Chaos battle Thanos once more in an alternate universe when he possesses the Heart of the Universe.