Block Debuffs Skill is one of the strongest buffs in Raid Shadow Legends. The casting champion (depending on whether this ability is for the whole team or just this individual champion) becomes immune to all Debuffs. Instant negative effects such as Decrease turn meter are not affected and work as normal. It will mean you cannot have your defence lowered, or be stunned, frozen or dazed. This is a strong buff in any content but especially strong in Clan Boss to avoid your team running out of sync.