A descoberta Tumor Familiar da classe base Alchemist afirma:
Benefit: The alchemist creates a Diminutive or Tiny tumor on his body, usually on his back or stomach. As a standard action, the alchemist can have the tumor detach itself from his body as a separate creature vaguely resembling a kind of animal suitable for a familiar (bat, cat, and so on) and move about as if it were an independent creature. The tumor can reattach itself to the alchemist as a standard action. The tumor has all the abilities of the animal it resembles (for example, a batlike tumor can fly) and familiar abilities based on the alchemist’s caster level (though some familiar abilities may be useless to an alchemist). The tumor acts as the alchemist’s familiar whether attached or separated (providing a skill bonus, the Alertness feat, and so on). When attached to the alchemist, the tumor has fast healing 5. An alchemist’s extracts and mutagens are considered spells for the purposes of familiar abilities like share spells and deliver touch spells. If a tumor familiar is lost or dies, it can be replaced 1 week later through a specialized procedure that costs 200 gp per alchemist level. The ritual takes 8 hours to complete.
O que não está claro aqui é: o Alquimista escolhe a forma com a qual seu tumor se assemelha quando faz a descoberta ou escolhe uma forma toda vez que o tumor se destaca? O texto sugere que a criatura é escolhida toda vez que o tumor se destaca, mas depois afirma que o tumor também age como familiar quando ligado ao alquimista, dando a ele os bônus relevantes. Isso sugere para mim que apenas uma forma pode ser escolhida e essa é a forma o tempo todo, todas as vezes.