Death-dealing

The country was at that time ruled by a death-dealing tyrant.

Source: wiktionary

The aliens were armed with an array of death-dealing weapons.

Source: wiktionary

Busuli, the warrior whom he had stalked to the village, told him many of the tribal legends—how, many years before, his people had come many long marches from the north; how once they had been a great and powerful tribe; and how the slave raiders had wrought such havoc among them with their death-dealing guns that they had been reduced to a mere remnant of their former numbers and power.

Source: wiktionary

Sad lays were sung about the beset king, the vicious raids and ravages of Grendel, [...] how he would never parley or make peace with any Dane nor stop his death-dealing nor pay the death-price.

Source: wiktionary