Interdictors are available to Fenix in Co-op Missions, and are only buildable in carriers under the control of Clolarion. They unleash bombs on ground targets, doing area-of-effect damage to the target and everything around it. They are unselectable, and only two can be built per Clolarion occupied carrier.
2017-04-24, StarCraft II Co-op Commander Reveal. Twitch.com, accessed on 2017-04-24
Protoss Units and Structures of StarCraft II
Versus units and structures
units and structures