Tzeentch destroys a planet by speaking

Grey Knights pg.171 said:
(Tzeentch has just summoned his most powerful servants to the Warp-trapped planet of Thalossocres)

"When Tzeentch spoke, the planet shook. Its crust and mantle were torn off and to theis day, they say, Thalossocres is not one planet but a shoal of drifting continents surrounding a single core. Those not strong enough to hear the wordls of Tzeentch were thrown off into the warp, but the strongest stayed, their courts remaining glorious on the floating shelves of melting stone.

Tzeentch spoke to them of impossible things, of the tangled threads of fate that ran through the universe like threads of a tapestry, of the immense shifting components of reality - time, space, the massed minds of humanity and the dozens of alien species that had yet to play their parts, the mindless hordes of predators teeming in the warp, the powers of Chaos themselves. The Greatest of Tzeentch's followers could divine meaning from the stream of concepts the voice of Tzeentch conveyed. Some found intricate plots for them to enact on reality. Others saw glimpses of a future they could alter, or bring to pass. Some saw only desolation and hatred, and revelled in it, for they were the most savage agents of the Change.

Some were destroyed, unable to comprehend the majesty of the Change God's vision.

...

Fore days on end, measured in the strange timescale of the warp, Ghargatuloth recieved the revelation of Tzeentch. The other daemon princes looked on in awe, hatred and jelousy. Some were certain that Ghargatuloth would be destroyed. The daemons at his feet were swept aside by the tide of revelations. The substance of Thalassocres was further fractured by the sheer power of Tzeentch. There was a permanent scar left on the warp, a dark barren shadow, but Ghargatuloth remained."