Kyrik Fights the Demon World — Gardner Francis Fox

When Kyrik -- warlock warrior -- finds a dying man and a bloody parchment map, he is drawn into a whirlwind of evil in which demon lords contend for all Terra. With Myrnis, his gypsy sweetheart, and the aid of the thief pack, he brings five ancient magical gifts to the land of Surrillione -- where he meets betrayal by the very demon lord he has been forced to serve.

DEMON WORLD
Out of the darker shadows in a corner of the crypt came a many-fanged horror. Kyrik leaped and swung up his cloaked arm as fangs tore into the scarlet cloth, shredding it. The great reptile uncoiled its length and swung a whipping tail toward Kyrik.
'Illis aid me,' he breathed and his sword came up.
He swung with all the fury of muscles developed in a thousand battles. The snake hissed in pain and fury.