- Main article: M'uru (tactics)
Entropius is a void god into which the naaru M'uru transforms during the fifth boss encounter of the Sunwell Plateau. Some parts of M'uru's form are still visible.
- The name "entropius" is likely a derivation of "entropy", the amount of energy unavailable to perform work on a system, commonly construed to mean the level of "disorder" or "chaos" in a system. Entropy is also defined as the state in which all objects are moving toward a higher level of disorder.
- ^ Daintith, John. Oxford Dictionary of Physics. ISBN 0-19-280628-9.