Cyclone/Development

In the Legacy of the Void beta, the cyclone utilized the warhound's unit portrait.

The cyclone used to be able to attack air units from the outset. This was changed so that the cyclone could only attack ground units, but could be upgraded to attack air ones. This was then reverted back to its original state.

During the beta, due to the cyclone's reasonable speed, range, and damage against all unit types, it was not uncommon to see armies almost exclusively consisting of cyclones. Blizzard made adjustments to the unit to ensure that they would not be the only unit needed in a terran army composition. The initial upgrade was researched at the tech lab, and required a fusion core to access.

Lock on originally dealt 300 damage over 30 seconds for ground targets, and

240 damage over 20 seconds against air targets.

As of Patch 3.8.0, major changes were made to the Cyclone. The role was changed to a rapid attacker, and its attack speed was increased while its damage was increased. The "Mag-Field Accelerator" upgrade has been removed, and replaced with Mag-Field Launcher upgrade. By default the air attack of the cyclone was removed, but the lock on ability was made usable against air units and structures, though was no longer autocast. Mag-Field Launchers was removed in the next balance update.