Complex sentence: The tracker then reveals himself as the real Albert and warns Chris that if he stays with Annie for more than a few minutes he may be permanently trapped in Hell, advising that all Chris can reasonably expect is an opportunity for a final farewell to Annie.
Split into simpler sentences: The tracker then reveals himself as the real Albert, and warns Chris that if he stays with Annie for more than minutes he may be permanently trapped in Hell. All that Chris can reasonably expect is an opportunity for a final farewell to Annie.