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.


 * Unique Units: Bison, Cryo Troopers,  and ZAV-48 Frostraven
 * Privileges: Allows Serina to deploy and augment unit with cryo capabilities.
 * 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

Strategy

 * Any Leader Power that can lead all enemy units to frozen (Such as Glacial Storm, Cryo Bomb, and units frozen from Cryotech Advances), have your units focus fire on it to defeat them instead of moving to another target.
 * Seismic Blast is not effective against unfrozen units, but it's very effective against frozen units.
 * Cryotech Advances practically slows down any infantries attempting to capture a Power Node. This, however, was ineffective for any units under Let 'Volir's Leader Power, Banished Raid and Captain Cutter's Leader Power, UNSC Raid as they can de-capture Power Node faster than other units.
 * Have Kodiak as the Main Strike Force as Cryotech Advances augments the Kodiak's shell with the chilling effect, effective for crowd control and demolishing building faster.
 * If the player wishes to rush, quickly obtain Frostraven to make immediate suppression on enemy units.