Diplomacy failed. Tricks didn't work. Patience ran out. "Fine. Send in the Goristro." Siege Monster trait means double damage to walls - cities fall when these demons charge. 437 HP, AC 19, INT 6 (smart enough to know it's being used). Someone pointed this living weapon. Demon lords unleashing destruction, drunk wizard summoning what he can't control, or a free Goristro standing motionless - weapon without wielder. Maybe it destroys because that's what it knows. Maybe it seeks the Abyss. Maybe it waits for threat. Players aren't saving it. They're deciding where the disaster lands next. Who sent it? That's the real monster.