Descent of Angels.

"Most think Angels to be graceful creatures, something to float down to you upon gleaming wings. Our Angels came down in a streak of fire, to bring their "redemption" upon us."

Their arrival was heralded by a comet, a single stark-white drop pod. Four warriors of unparalleled skill and power. Four Space Marines. Warriors dedicated to the Imperium of Man, enhanced beyond normal human capability, and armed with weapons to make even the greatest beasts shudder at their power. Warriors who are incapable of being bested. They never came with peace in their hearts, and they would never leave until every being upon Remnant bowed to the God-Emperor.

War is inevitable. Death with follow, for one can't hope to win against the Angels of Death.