Contains 4 objects:

• HORSE
• HORSEMAN
• PUZZLE_ITEM (gem)
• PUZZLE_HOLE (for gem)

The HORSEMAN can be used as an enemy alone.

Put the gem (puzzle_item) on the same square as the horseman if you want it to drop it after death.

For the HORSEMAN first to ride the HORSE, place both on the map with an AI_FOLLOW nullmesh (in the TEN base wad) on the same square as both of them. Then, trigger them both.