His imp gang likes to sneak into Stormwind to spraypaint "Ragnaros Rulez" on the Mage Tower.
Imp Gang Boss was a Tier 3 minion in the Battlegrounds game mode.
Imp Gang Boss serves an important role in Demon compositions as the primary source of tokens for Soul Juggler. This makes it a prime candidate for buffs, allowing it to summon more Imps before dying. Try to place this minion near the right side to maximize the available board space for Imps to spawn. Khadgar will let you spawn even more Imps in combination with this card.
Giving Taunt to Imp Gang Boss is a double-edged sword. While it forces enemies to target this card before Soul Juggler and thus potentially spawn more Imps, it also runs the risk of getting this minion destroyed before it can summon enough Imps to rack up damage and makes it vulnerable to Poisonous attacks. Furthermore, Demons already have access to Voidlord, which works better as a Taunt that summons tokens since the actual number of hits it takes is irrelevant.