The Seedbearers Trilogy Series by Peter Valentine Timlett

Vardek the Butcher, Lord Commander of the Army vs. Khamadek, High Priest of the Temple of the SunThe future of mankind lay in the balance. Arrayed in battle formation were the forces of evil and the legions of good - men and supernatural powers locked in a war to the death. The High Priest was an old man, his powers waning fast... moreVardek the Butcher, Lord Commander of the Army vs. Khamadek, High Priest of the Temple of the SunThe future of mankind lay in the balance. Arrayed in battle formation were the forces of evil and the legions of good - men and supernatural powers locked in a war to the death. The High Priest was an old man, his powers waning fast. His weakness and vanity - coupled with the lust of Zesta, the High Priestess - had allowed the Temple to sink to a point where Vardek could openly defy the immense power of the priesthood. Out of his defiance would come total destruction. The entire Atlantean nation was doomed to be engulfed. Nothing would remain to show it had ever existed. But some few would survive the holocaust. These were the seedbearers to the new age. less

Druthin, Arch-Mage of the Druid cult, called his priests to the sword when Mog Agorn defected to the demon powers and beseiged sacred Stonehenge. Not only was the survival of Druidry at stake, but the fate of humanity as well. For Mog Agorn had made an awesome pact with the dark forces. He'd bedded his only daughter to spawn a vile champion from the depths of hell. And he'd sworn mankind's unborn children to the evil ones in return for victory...

The Druid cult was doomed to total annihilation by the invading Romans. But the mystical tribe of warrior-priests called up every weapon of man or magic to aid their sacred quest. Bold swords, brutal lusts and demon rites were all unleashed in a war that shook the walls of the universe. And ushered in the bloody dawn of man's awesome destiny...