Hmmm... interesting point, Lord. You don't have the Mavin, but you have sworn the oath. I think Willow is referring to being consumed when you pick it up -- but that would be a heck of a "GAME OVER" when it happened. A first-time gamer might never come back
But an option for second-timers... there's a thought. Imagine a flag in addition to difficulty and spawn frequency: Oath enforcement. Wouldn't that make life... challenging...