A chance encounter at a Faneuil Hall restaurant between a yoga instruc­tor and a Queens, N.Y., man turned into a terrifying ordeal when the self-described Satanist threatened to kill her “without blinking an eye,’’ officials said.

Christopher Cori, 21, pleaded not guilty to criminal threats and harassment charges in Brighton Municipal Court Tuesday, where bail was set at $100,000 cash. Cori did not make bail and is expected to undergo a mental health evaluation at Bridgewater State Hospital in the coming days.