Runespoor

Three heads are better than one, as this magical snake proves. Each head has a role: the planner, the dreamer and the critic. As a Patronus, it reflects your canny ability to adapt your thinking to help any situation, such as fending off Dementors.
Written by the harrypotter.com team
“The Patronus is a kind of positive force, a projection of the very things that the Dementor feeds upon - hope, happiness, the desire to survive – but it cannot feel despair, as real humans can, so the Dementors can’t hurt it.”
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