How do you get Voldemort Character Tokens?

Could you please elaborate on the process of acquiring Voldemort Character Tokens? Is there a specific method or series of steps that need to be followed in order to obtain them? Additionally, are there any requirements or prerequisites that must be met prior to being able to acquire these tokens? I'm particularly interested in knowing if there are any challenges or difficulties that may arise during the acquisition process, and if there are any tips or strategies that can be employed to make the process smoother and more efficient. Thank you for your time and consideration.