A Witch's familiar can be any kind of creature, hypothetically. Typically more domesticated creatures are chosen—such as cats, for example. The friendlier the animal is towards humans, the easier it is to establish the bond. This—
[He raises his hand near the cobra, and it reluctantly slithers onto his arm, coiling loosely around his wrist and fist.]
—is a snake. It's a kind of reptile, and mine happens to be poisonous. Take care not to startle it.
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A Witch's familiar can be any kind of creature, hypothetically. Typically more domesticated creatures are chosen—such as cats, for example. The friendlier the animal is towards humans, the easier it is to establish the bond. This—
[He raises his hand near the cobra, and it reluctantly slithers onto his arm, coiling loosely around his wrist and fist.]
—is a snake. It's a kind of reptile, and mine happens to be poisonous. Take care not to startle it.