Fusion core

The fusion core, formerly known as the anti-matter core and deep space relay, is a terran structure in StarCraft II.

The fusion core allows the production of s and is associated with battlecruiser-specific abilities.

Wings of Liberty
In the Wings of Liberty campaign, the fusion core allows the production of the hercules dropship at a starport.

Development
The fusion core experienced a rather rushed and unplanned development. It was the intention of the designers that advanced terran structures feature circular shapes, but the fusion core's shape became simple and repetitive. The front and back pistons were tweaked to oval shapes to make them more interesting.

Players used to have a choice between three abilities on each battlecruiser. This was removed from multiplayer by the beta, but is featured in the campaign.