Jareg is a Magic affinity epic from the Lizardmen faction. Jareg is one of the best decrease attack champions for the Clan Boss especially if paired with a second champion capable of doing an ally protection ability. Despite having multiple legendaries who could fill this spot, Jareg with Skullcrusher outperformed them all with that great ability to swap Ally Protection buffs throughout the fight and keep the rest of the team alive. Jareg also brings an increase defence buff and a passive heal ability.
Outside of Clan Boss Jareg works well as a protector, especially strong in Spider to assist your damage dealers.