Geobukseon

When the geobukseon Stops, it's Concealed by the smoke for 1 round or until it next moves. The geobukseon can't use this concealment to Hide or Sneak.

The roof of a geobukseon is difficult terrain and hazardous terrain. A creature that moves on the roof takes 1d6 piercing damage for every square of that area it moves into. Falling Prone on the geobukseon's roof deals 5d6 piercing damage.

These squat vessels are built with a protective shelllike covering on their deck rather than the open main deck design of most sailing vessels. The fully covered deck protects the vessel's 80 rowers and complement of 50 soldiers from arrows and incendiary weapons. In addition, this armored deck is covered with iron spikes to discourage enemies from attempting to board.

On the bow of the vessel is mounted a dragon head which can emit sulfur smoke to effectively hide its movement in close combat. Below the dragon head is mounted a large anchor with a wooden crest shaped like a face, and these can be used to ram into enemy ships.