Tempest: Powerful capital ship that can dominate the skies with massive area-of-effect attacks against light enemy flyers and a strong beam against ground targets.

It can reveal what structures are making and also temporarily disrupt building production and resource harvesting. The Protoss receive a massive boost to their aerial presence, using many psionic abilities to their. The Terran army is all about durable steel and flaming rubber, and the new units in their repertoire. It was Blizzards intention to enhance the uniqueness of each playable species.

Oracle: This flying support unit can scout and disrupt the enemy economy. 'StarCraft 2: Heart of the Swarm' New Unit Change Guide Terran Units. There are new multiplayer units for each of the three playable races.

The replication also auto-enables any specific upgrades of the targeted unit (cloaking, etc.).

Replicant: Microscopic robots can fuse themselves to copy a targeted non-massive unit.

Safety protocols auto-disable the attack if other friendly units enter the danger zone.

Shredder: Mobile unit that can deploy and create a whirlwind of death around it.

Great for fighting mixed forces using light troops combined with area-of-effect attacks.

Battle Hellion: New transformation mode to gain durability in exchange for slower movement.

Warhound: This versatile factory unit is great against mechanical ground targets and can dish out area-of-effect anti-air attacks.

Swarm Host: This Zerg host can gradually spawn endless waves of attackers while burrowed to overwhelm your enemy.

It can grant detection to units, create a cloud to hinder ranged attacks and abilities, and quickly pull units to safety (friendly) or their doom (enemy).

Viper: Flying unit with support abilities.

Descriptions of the units from Blizzard below:

Heart of the swarm new units