Raid Shadow Legends – The Decrease Defence debuff is one of the most important debuffs in Raid Shadow Legends to help your team defeat enemy champions. Defence can mitigate up to 85% of all the damage you are attacking with, therefore decreasing 60% of that defence number gives you a far higher damage potential. This is one of the first positions to fill in nearly all content in Raid, especially important in Arena, Dungeons, Faction Wars and Doom Tower. Warmaster and Giant Slayer hits do improve with Decrease Defence. There are two versions a 30% debuff and a 60% debuff.