During the mid 1970s, the Soviet Navy saw the need for a new anti-submarine corvette for patrolling the Black sea. The resulting vessel from Project 12412 was named the "Molniya-2", or per its NATO reporting name, the Pauk class. The Molniya-2 was based on the larger Project 1241 Molniya-1 (NATO reporting name: Tarantul class) corvettes, being a lighter anti-submarine variant of the Molniya hull. Pr.12412P is a semi-official designation applied to the initial prototype, which used the larger M-507A diesel engines from the Pr.1241 Molnyia-1 corvette, giving it a small increase in engine power and top speed over the production variant.

Introduced in Update "Wind of Change", the MPK Pr.12412P (Molnyia-2) bolsters an already incredible line-up of coastal vessels at that rank of the Soviet tech tree. Joining the likes of other formidable vessels of similar tonnage such as its sister MPK Pr.12412 in the tech tree and the powerful SKR-7, the "Molnyia-2" brings more to the table than some of its contemporaries. The Pr.12412 has access to a rapid firing autoloaded 76 mm turret with access to two kinds of HE shells, including a HE-VT proximity-fuse shell for dealing with aerial targets (with the help of its radar-aided fire control system), along with a rotary AK-630 CIWS in the rear for dealing with closer and lower flying targets by filling the air with lead at 5,000 RPM. The diverse armament does not end there, as the Pr.12412 also has access to mortars, depth chargers, and decent torpedos all at once, making it a true "jack of all trades, yet master of none" for its class. One must be cautious when playing the Pr.12412 due to its sub-par armour (which becomes even more useless when uptiered to face bluewater destroyers), and to not be too trigger happy with the AK-630 CIWS due to its tendency to jam under sustained fire, and its insane rate of fire depleting ammo supplies very quickly when left unchecked.