Smartcasting is a micromanagement tool in StarCraft II. When multiple units are given the same spell order, only one of them will comply, preventing a serious waste of spellcaster energy.

List of Smartcast Abilities

Not all unit abilities are subject to smartcasting.

For instance, the stalker's Blink ability does not use smartcasting. When a group of stalkers are ordered to Blink to an area, all the stalkers will blink.

The following abilities are not smartcast:

• Baneling explosion
• Burrow (most zerg ground units)
• Blink (stalker)
• Cloaking (Banshee, ghost, Wraith, spectre)
• Defensive Matrix (battlecruiser)
• Stimpacks (marine, marauder)
• Siege tank transformation
• Viking transformation

The following abilities are smartcast:

• 250mm Cannons (thor)
• Any production structure building a unit
• Chrono Boost (nexus)
• Nuke (ghost and spectre)
• Force Field (sentry)
• Graviton Beam (Phoenix)
• Guardian Shield (sentry)
• Terran Infestation (infestor)
• Irradiate (science vessel)
• Psionic Lash (spectre)
• Psionic storm (high templar)
• Scanner sweep, Calldown: MULE, and Calldown: Supplies (orbital command)
• Snipe (ghost)
• Transfusion (queen)
• Yamato cannon (battlecruiser)
• Zerg unit transformations