On the Pottermore Fan Forum, we have a Capsule Vending Machine. Every two weeks (every week for VIPs), members can use the machine to get a figure for their collection. Every once in a while a new set is added.
This set is based on magical beasts which the Ministry of Magic has classified as the most dangerous. From left to right: Acromantula, Basilisk, Chimaera, Dragon, Lethifold, Manticore, Nundu, Quintaped and Werewolf.
To collect these yourself, head on over to the Pottermore Fan Forum
(the grey and gold figure bases were originally made by Danul)