The Blizzard Chaser is a boss monster that appears in the Mines of Parasite Eve II. It is the one of a few multiple part boss fight and the second form is far stronger than the first. Naturally, it is a Chaser type ANMC.
This is the first form of the Blizzard Chaser, this form has only slightly double that of a normal Desert Chaser but also features a very different attack strategy. Instead of simply charging at Aya, the Blizzard Chaser will attempt to pounce on her before running away. When it dies, it drops the second Jumper Plug and Kyle's handgun.
This version of the Blizzard Chaser is fought right after the first form "dies" and appears that its outer skin has dissolved from the death of the neo-mitochondria but not the body as a whole. This form hits just as hard as the original but also has five times the HP of the original. After this version's death, the Blizzard Chaser is finally no more.
The drops in the first fight are not not actual enemy drops, but the engine treats them as unique pickups. The proper enemy drops happen at the end of the 2nd battle where you can pick up a P229 if you missed it the first time around.