Tombs of Terror (Heroic Mode). I’m passing Episode 2. Upon activation of the Murchal’s Warhorn treasure, both Eliza and K`Zret die, punishment insane. Again the duel with the boss begins.
There is currently indeed an issue with Murky’s Battle Horn. If the player uses it, both heroes die and the game is considered a tie. Which in Tombs of Terror means your run doesn’t end but you don’t progress either: you get no new rewards and fight a new boss at the same tier.