The major strength of Drake's fruit is that it allows him to turn into an allosaurus, a large and powerful predator from the prehistoric era. This makes this fruit well-suited for combat purposes, since carnivorous Zoans are said to be fiercer fighters than non-carnivorous ones.
While in full allosaurus form, Drake's own size increases, making him bigger than a Pacifista, and he retains this size while in hybrid form. He is also granted a strong biting ability that can even damage the heavy armor of the aforementioned Pacifistas, which are said to be stronger than steel. However, Drake is still vulnerable to their laser weapons even while transformed.
This is the first Ancient Zoan power seen in the series.