Halo Wars 2: Serina Leader Pack

The Serina Leader Pack brings back old-school AI with powers and units including:
• New Cryo-based units and abilities to slow or freeze your enemies
• Combo attacks to shatter frozen targets with proper timing and execution
• Ice Barriers let you divide (and conquer) the battlefield as you wish
• The Glacial Storm ultimate ability forces opponents to choose between retreat or a frozen death