Horus Heresy Collected Visions

A look of rage transfigures the Warmaster. He stretches out a
hand and a bolt of force leaps forth. The Emperor screams as agony
wracks his body."Feel the true nature of my power then
tell me I am deluded," roars Horus, in the voice of an angry god.

Beads of sweat stand out on the Emperor's forehead, he steels
himself against the pain."You are deluded," he says.

Once again Horus gestures and lances of pure poison sear
through the Emperor's veins."I let you come here, old friend, so
that you could witness my triumph. Kneel before me and I will
spare you. Acknowledge the new master of mankind."