Outer Planes

If the Inner Planes are the raw matter and energy that makes up the multiverse in its physical form, the Outer Planes, known also as the Afterlives, are the direction that form is given, with thought and purpose crafted for every construction.
As with the Elemental Planes, the perceptible parts of the Outer Planes are mostly borders of the plane itself, while beyond that border is a formless expanse of spirit which is entirely beyond ordinary sensory experiences. Every plane is different fundamentally from any other, and these differences form the natives of that plane.
Distance and time are relative concepts in the Outer Planes. The Planes sometimes appear to be entities in their own right, with whims and desires that allow them to manipulate the experiences of all within. They do bow to the wills of the gods and lords that rule over them, but often they have a will of their own.
There may be many more, but there are fifteen known Outer Planes. They are the birthplaces of fiends and celestials, who are born and created in service of the deities that live in the Divine and Unknown Planes. Despite being known as the Afterlives, only ten of these planes can be afterlives for mortal souls which are, perhaps coincidentally, the ten Divine and Worldly Planes, which contain 'child planes' that house gods and archfiends. No creature can travel to or from these child planes, but the creatures who inhabit them have a vast power than can extend to any other Plane in the system.
The Outer Planes are:

• Pyropa, Plane of Law
• Atallata, Plane of Order
• Daxnos, Plane of Harmony
• The Beastlands, Plane of Nature
• Desola, Plane of Hunger
• Ocea, Plane of Beauty
• Hastis, Plane of Penance
• Astasia, Plane of Delight
• Ymos, Plane of Strife
• Anthos, Plane of War (also called the Wartorn Plane)
• Shieldfall, Plane of Glory
• Lotasis, Plane of Desolation
• Arachnea, Plane of Infinity
• Kartona, Plane of Chaos
• Hetmini, Plane of Duality

Divine Planes Within some of the Outer Planes are what are known as "Divine Planes," child planes where, as the name suggests, gods live. There are five Godly Planes, which act as 'Ethereal Planes' for their parent plane. The Divine Planes are: Divine Plane of Law (child of Pyropa), Divine Plane of Nature (child of the Beastlands), Divine Plane of Penance (child of Hastis), Divine Plane of War (child of Anthos), and the Infinite Divine Plane (child of Arachnea.) They are also afterlives.
Worldly Planes Opposite the Godly Planes are what are known as "Worldly Planes," child planes where the archfiends live. There are five Worldly Planes, which function identically to the Divine Planes, and serve as homes for archfiends who birth fiends. They are: Orderly Plane (child of Atallata), Hungry Plane (child of Desloa), Delightful Plane (child of Astasia), Glorious Plane (child of Shieldfall), and Chaotic Plane (child of Kartona.) They also function as afterlives.