Big ‘Un is a Magic affinity legendary from the Ogryn Tribes. Big ‘Un is one of the hardest hitting AOE champions with all of his skills attacking all enemies. This makes him an amazing campaign farmer and one of the few champions capable of farming Nightmare campaign on Auto solo.
Big ‘Un has a great set of control skills as well inbuilt into his high damage attacks with debuffs such as AOE stun, decrease accuracy and decrease speed. These abilities mean he can be useful in any dungeon content for wave control and is effective against Spider.
Make sure you build with enough accuracy (Dungeon level x10) to land those amazing debuffs, get his speed high, then focus on crit rate and crit damage.