The Warhorse Door can be found in the bottom left of the room with the undead carriage driver, the one where he helps you get across to the other side. This is an area you find quite early on in your journey, and you may well have forgotten all about the door by the time you actually reach the key.
Well, how about instead of you worrying about things, I let you know precisely how to solve this mystery.
Where To Find The Warhorse Door and Warhorse’s Key in Bloodstained: Ritual of the Night
In case you can’t remember where the door is, it’s specifically in the Garden of Silence, just to the left of the Waypoint there.
The Warhorse’s Key, on the other hand, can only be found after you have reached the Glacial Tomb, which is a fair bit into the game.
The easiest way to find the key is to head left from the Glacial Tomb’s Waypoint. You need to go in a straight line until you find an enemy in a small room. Crush it, then grab the Warhorse’s Key from the chest under it.
Now that you have the key, it’s time to go and open the Warhorse Door. This is where things get tricky.
Inside is a small room with a nasty boss who has 6,666 HP and a lot of dangerous attacks. The best thing to do is to take holy weapons and spells, as they do the most damage. Beat this monstrosity, and you’ll be rewarded with the powerful Ruinous Rood spell.
Hopefully this helped you find your way to the Warhorse’s Key to get that pesky door open. If so, check out our other Bloodstained guides here on GameSkinny.