The Greed of Giants
With the gift of magic in the hands of the Titans, Medea left the dimension, presumably to work on another that needed help. The Titans began to harness the magics and at first they found use in the powers for utility. They would use the magics to assemble their huts, dye the colours of furs and even clean themselves.
Then they learned to harness magic to change the wilds around them, teleporting animals and sometimes wrongly summoning Monsters into existence. They learned to feed themselves through magic and eventually they took to warping themselves with such powers. The Titans changed their appearances, some warping their bodies to match that of animals, others adding masses of muscle and some focusing more on the height.
Eventually the majority of the Titans were satisfied with how they looked and as such each tribe had its own unique appearance. Then the Titans began to explore beyond the immeasurable plane they had before them. They began to expand into the Multiverse, some in hopes of finding a utopia and others in hope of being able to claim somewhere to call home.
The Titans, now spread throughout the Multiverse, began to forge their own perfect visions.
The first beings the Titans created were those that they saw in their dreams and nightmares. On the plane of Xibal, the plane of apocalyptic wastelands, the Daemons were forged into exitence. From here the Titans began to experiment with their powers of Ancient Wild Magics.
The evil planes slowly infused the Titans with their wicked thoughts making them create twisted beings of great power, Devils. Whilst this happened in the dark corners of the Multiverse the good planes slowly transformed the Titans into beings of great nobility, pushing them to seek law and order in the lands they cast under their wing. This led to the creation of Angels.
Other planes infused Titans with elemental powers such as those of Air, Earth, Fire, and Water. The infusion of the elements gave birth to the first Primal Elementals. Eventually each plane saw development of some kind, but the Titans began to grow greedy.
The evil beings started to kill each other for power and eventually the battles spilled into the Multiverse, those that sought law and order would fight in wars that spanned planes to damn those that were evil back into their own twisted paradises.
The Greed of Giants would lead to a power struggle that saw a rise in evil gaining power, this was known as The Titan Tragedy.