Raid: Shadow Legends – Speed Auras boost your entire team’s Speed in the area that their Aura relates to but only if you put this champion in the leader position. Speed is probably the most important stat in Raid and a speed Aura is a must for Arena! The only Aura that will work against Clan Boss is an All Battles Aura. Aura’s are generally stronger on Legendary Champions and weakest on Rare Champions however this is not always the case!
You retain this additional Aura bonus even if your leader dies.