Imagine yourself, swimming in a deep ocean duringnight.
The sea is cold and strangely calm... Suddenly, you see inhuman shapes moving towards you! Sensing danger, you swim in panic, trying to get away from them.
Just when you think that those unspeakable sea horrors got you ... you wake up. A set of black-green dice lies at your table - and you are sure they weren't there when you fell asleep...