Terrence the Rage is a level 121 boss that may be encountered when Dungeoneering. He attacks with crush based melee and can hit through protection prayers, easily hitting 300+. He is weak to slash, and as such 2h swords, rapiers and battleaxes are useful to dispatch him.
If you have good defence (90+) and 300+ crush defence, you can probably kill him easily with a strong slash weapon, assuming you have used stat boosting prayers and super attack and strength potions.
If you are a low defence pure, a good strategy would be to use Ice Barrage and freeze him, completely removing the threat of his high hitting prayer negating attack.