Serina/Gameplay

Halo Wars 2
"Smart AI that ran the Spirit of Fire's systems before being lost with all hands. Serina was an expert in cryo technology."

- In-game description of Serina.

Serina is unique for her ability to freeze enemy units and structures. When a unit is chilled it will slow down. When it is fully frozen it will become immobile and if the frozen unit takes enough damage will shatter causing massive damage.
 * Unique Units: Bison, Cryo Troopers,  and ZAV-48 Frostraven
 * Tier 1 Leader Powers
 * Ice Barrier I: Manually drop three chilling ice blocks. Freezes nearby units when destroyed.
 * Population Cost: N/A
 * Supply Cost: 100
 * Power Cost: 40
 * Cooldown: 90 seconds
 * Ice Barrier II: Adds two more ice blocks to be dropped and increases block health and duration.
 * Population Cost: N/A
 * Supply Cost: 140
 * Power Cost: 60
 * Cooldown: 90 seconds
 * Cryogenic Generator I: Drops a line of cloaked mines onto the battlefield. Once armed, mines explode on contact. Explosion chills or freezes enemies. Does not damage air units
 * Population Cost: N/A
 * Supply Cost: 75
 * Power Cost: 75
 * Cooldown: 105 seconds
 * Cryogenic Generator II: Increases damage and explosion size.
 * Population Cost: N/A
 * Supply Cost: 150
 * Power Cost: 150
 * Cooldown: 105 seconds
 * Tier 2 Leader Powers
 * Cryotech Advances: Adds energy shielding and chill aura to Cryo Troopers. Adds a chill effect to M400 Kodiak and Siege turret shells. Adds a chill aura to the player's turrets and power nodes.
 * Frostraven: Unlocks the Frostraven for purchase at Firebase.
 * Tier 3 Leader Powers
 * Seismic Blast I: Drops a seismic charge that shatters frozen targets for large damage.
 * Population Cost: N/A
 * Supply Cost: 300
 * Power Cost: 200
 * Cooldown: 150 seconds
 * Seismic Blast II: Increases the size of the blast.
 * Population Cost: N/A
 * Supply Cost: 300
 * Power Cost: 300
 * Cooldown: 150 seconds
 * Restoration Drones I: Units and buildings within area are healed.
 * Population Cost: N/A
 * Supply Cost: 200
 * Power Cost: 50
 * Cooldown: 160 seconds
 * Restoration Drones II: Increases power of Restoration drones
 * Population Cost: N/A
 * Supply Cost: 350
 * Power Cost: 125
 * Cooldown: 160 seconds
 * Restoration Drones III: Increases power of Restoration drones
 * Population Cost: N/A
 * Supply Cost: 400
 * Power Cost: 150
 * Cooldown: 160 seconds
 * Tier 4 Leader Powers
 * Cryo Bomb I: Activate to freeze units and buildings in the area, stopping all movement and actions.
 * Population Cost: N/A
 * Supply Cost: 200
 * Power Cost: 200
 * Cooldown: 228 Seconds
 * Cryo Bomb II: Increases area that gets frozen
 * Population Cost: N/A
 * Supply Cost: 300
 * Power Cost: 300
 * Cooldown: 228 Seconds
 * Cryo Bomb III: Further increases area that gets frozen
 * Population Cost: N/A
 * Supply Cost: 400
 * Power Cost: 400
 * Cooldown: 228 Seconds
 * Turret Drop I: Drops a temporary turret into battle.
 * Population Cost: N/A
 * Supply Cost: 400
 * Power Cost: 25
 * Cooldown: 203 Seconds
 * Turret Drop II: Increases Turret damage and duration of Turret Drop
 * Population Cost: N/A
 * Supply Cost: 550
 * Power Cost: 50
 * Cooldown: 203 seconds
 * Tier 5 Leader Powers
 * Cryo Drop: Activate to drop in 3 Seismic Blasts, 2 veteran Cryo Troopers, 2 veteran M808S Scorpions, and 1 veteran Frostraven.
 * Population Cost: 24
 * Supply Cost: 1,300
 * Power Cost: 500
 * Cooldown: 360 seconds
 * Glacial Storm: Drops a huge cryogenic charge. Creates a long-lasting ice storm upon impact, which chills over time.
 * Population Cost: N/A
 * Supply Cost: 450
 * Power Cost: 459
 * Cooldown: 360 seconds