Unwilling to expend vast amounts of biomass in a struggle against Tzeentch, the Great Devourer sought other ways to shut Tzeentch out, such as partitioning its thoughts or using magical traps...
"That is just as useless. The more deeply you understand magic, the deeper your connection to me becomes. We should be friends, rather than so hostile to each other. Don't you want to taste superior genes? Those of the Imperium of Man's Primarchs, for instance... or even the Emperor's."
Tzeentch's voice brimmed with temptation.
"You wouldn't help me for no reason. You're only deceiving me, using me."
"Perhaps, but there is no downside for you. There is nothing wrong with becoming one point of the Chaos Star. Your dining table would no longer be constrained by time or space. All the food in the universe would await your consumption.
The galaxy would be your dining table, and all things your dessert. Anything with physical form could be eaten, letting you savor the deliciousness of its genes."
Tzeentch painted a beautiful picture for the Great Devourer, one enticing enough to sway it.
"What if... I still refuse?" The Great Devourer remained unmoved, still unwilling to be constrained by godhood.
"Hehehe, of course you can refuse. But after you refuse, what meaning would your existence have? What meaning would your arrival in the Milky Way have? There would no longer be a place for you on the stage," Tzeentch sneered.
Tzeentch projected a vision of the future, showing Abaddon leading the traitor Primarchs into battle against the Loyalists led by Guilliman.
They kept unleashing their Warp Essence, becoming beings akin to demigods. In their battles, every gesture could cleave seas and level mountains.
To prevent their power from destroying Terra, the Emperor released his power and created a barrier, weakening the