Close that shit

The Dominion had returned home, but where its Warp engines had once been located there was now a huge Warp rift – a darksome hole from which the energies of the Immaterium poured forth. Having driven the daemonic hosts before him, Ghazghkull ordered the massed firepower of his entourage to be turned against the tear in reality. To his frustration, this did nothing to it. With a bestial roar, and leaking raw green energy from his reconstructed skull, Ghazghkull charged the rent. To further anger the Warlord, his power klaw proved equally ineffectual and, with an almighty challenge, Ghazghkull unleashed the full thunder of his best headbutt. There was a flash of green, an audible pop, and, at last, the rift collapsed upon itself. Whether it was the force of that blow, or the latent psychic energy within Ghazghkull, it was done, and the Daemon threat ended – at least for a time.

WAAAGH! GHAZGHKULL codex supplement