- +0.3 damage.
- +0.1 speed.
- Also affects maximum speed (may never exceed 2.0).
- When entering a room connected to an undiscovered Secret Room or Super Secret Room, a howl sound effect will play.
- A barking sound will play if there is an undiscovered Crawl Space in the room.
- A sound won't play in the first room of a new floor until you re-enter the room.
- An extra Crawl Space added by Stud Finder will not trigger the sound.
Plays when an undiscovered Crawl Space is in the current room.
Plays when an undiscovered (Super) Secret Room is adjacent to the current room.
- The pickup quote appears to refer to the way the game associates Moon with secrets, with XVIII - The Moon teleporting to secret rooms and Fragmented Card being a torn Moon card that spawns extra secret rooms.
- "Bark at the moon!" could also be a reference to the song and album made by Ozzy Osbourne.
PC FER4 C60A (Treasure room adjacent to spawn)
PC FG2A JQMY (Treasure room adjacent to spawn)
PC SHCC X2ML (First Treasure Room)