From Halopedia, the Halo wiki
The "Lockdown" Scorpion is a variant of the M808S Scorpion.
The M808S Scorpion originated during the long years of the UNSC Spirit of Fire's drift through space. During this time, Serina took to upgrading the base Scorpion model with numerous improvements. Isabel would find little to improve in these designs, but she sees possibilities for specialized variants that leverage the chassis for other roles. It is likely the Lockdown Scorpion is one of these specialized variants.
The Lockdown Scorpion is a Blitz card available for use by players playing as Isabel in Halo Wars 2, particularly in the Blitz and Blitz Firefight modes. The Lockdown Scorpion has the following attributes;
The Lockdown Scorpion is classed as a Main Battle Tank, and performs well against infantry, vehicles and aircraft.
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