Trillion: the Three-Headed Lion (Beast Quest, No. 12)

The peace of Avantia has been shattered by a fearsome new Beast --Trillion the Three-Headed Lion. If he is to save the Kingdom, Tom must defeat Trillion and collect all the pieces of magical golden armor. But the task will not be easy. The evil wizard Malvel is determined for the boy to fail, and has a special plan in mind.