Ancient Saddle

The ancient saddle is a DLC exclusive item. It is part of the ancient horse set. It can be found behind The Great Horse Fairy's fairy fountain in mettle chest buried in the ground so you need to use the magneses rune to get it out. It teleports your horse to you when you whistle as long as you are in an area where it can appear, it is out of the stable, and it is currently wearing the saddle. This can be inconvenient if you use the infinite whistle run glitch often as the horse sometimes teleports in front of you and you can't run through the place where it spawns.