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, (Hero unit) Cryo Troopers, (Replaces Hellbringers) 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 (One Retriever Sentinel per player only)

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.