Spikefin is the fifth Beast Tom must battle in the Warlock's Staff series.
Spikefin has slimy grey scales and razor-sharp teeth. He also has ferocious claws and fins, and he can use his huge whipping tail. He has muscular arms and red eyes.
Spikefin can use his tail, claws and fins to destroy boats. His scales also give him armour that cannot be pierced through. He also has a trident which he can use to impale his victims and to drag them to a watery grave. Spikefin has one final power-his teeth can crack through anything.
Spikefin was actually a happy 39-year-old fisherman named Brenner, who had been stabbed by Malvel, turning him into this hideous monster.