Master Order

Master Order is a powerful cosmic entity native to Marvel comics, who functions as a supreme agent of ordered events, thoughts and ideas - he is eternally bond yet opposed to his "brother" Lord Chaos, the two are depicted as extremely one-sided and only truly function properly when together, despite their complex rivalry.

Master Order is usually neutral but has at times become a serious threat, alongside his "brother", due to the vast powers and one-sided nature of the entity.

Notable Events
Master Order and Lord Chaos created the In-Betweener to act as a balancing force in their rivalry, this entity has been known to engage in villainous activities, such as trying to drive the universe into madness - thus by default Master Order is partially responsible for these actions.

In at least one alternate universe Master Order and Lord Chaos killed a weaker version of the Living Tribunal, despite this not usually being possible, this was later revealed to be part of a vast cosmic plot by the First Firmanent.

Abilities
Master Order is a vastly powerful conceptual entity, only able to manifest via an M-Body (Material Body) via the Dimension of Manifestations - as the supreme agent of ordered ideas, events and thoughts he has unlimited power over such phenomena but is limited by being fixed in an eternal state of "ordered" behavior, just as his "brother" is in an eternal state of "chaotic" behavior.

Trivia

 * Master Order and Lord Chaos are among the strongest cosmic entities in Marvel's "mainstream" cosmic hierarchy - yet stand below Eternity or Death.