One Tooths slowly fly towards Isaac, charging at random intervals at considerably higher speed. They will shy away from Isaac if directly approached.
- Two One Tooths will spawn in the secret crawlspace created by killing Great Gideon using a Chaos Card.
Fat Bats move slower than a One Tooth but have more health. Fat Bats try to align themselves diagonally to Isaac, giving them a tendency to avoid his shots. They will try to shoot at Isaac once they are diagonally aligned.
- Fat Bats were first revealed for the Afterbirth DLC in a Binding of Isaac official website post.
|The Binding of Isaac: Rebirth|
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