A reckless Dark Iron Dwarf archaeologist last seen in Un'Goro in WoW. Flavor text: "Used a Bull Dozer to find a porcelain cup. Also keeps digging up this Jeklik troll."
The card spared for both players is random. An all-in tactic that is another way to mass-spawn returning discards like Jeklik, and a sure-fire OTK/Combo prevention, though there is a chance of backfire on say, their Mecha'thun surviving or essential cards remaining in their deck.
The damage to self and friendly minions, as well as the mana cost, are set to keep aggro and Jaraxxus-turned warlocks from taking advantage of the card.
Imagine like a brawl effect that only involves the two minions in combat, basically only one of the two dies and the other takes no damage (50% chance to win the combat for each minion). An rng stall option like noggenfogger basically.
"...♫ 200 dwarves drunk in a cave, one laughs too hard, a mug in the face, now one less dwarf to chug down the ale; 199 dwarves drunk in a cave ♫..."