Sontaran flagship

A Sontaran flagship was a massive spacecraft that served as the Sontarans' primary offensive vessel.

The ship looked like a ball with eight curved claws. For battle, the top and bottom claws would withdraw and lock together to reveal a cannon that could devastate a planet's surface. Along the centre of the ball were docking ports for dozens of Sontaran scout ships.

One particular Sontaran flagship led the Sontaran Empire's Tenth Battle Fleet. It was commanded by General Staal. The flagship orbited Earth. It was the spearhead for a Sontaran invasion to turn Earth into a cloning world. It was linked to the planet via teleport pods between the ship, the ATMOS factory and the Rattigan Academy.

The ship was destroyed by Luke Rattigan, when he activated his Atmospheric Convertor on the bridge. (DW: The Sontaran Stratagem/ The Poison Sky). One Sontaran, Commander Kaagh, in flight near the flagship, survived and landed his spacepod on Earth. (SJA: The Last Sontaran)

The Twelfth Battle Fleet also had a flagship. (QR: The Sontaran Games)

The Sontarans of the Fourth Sontaran Intelligence Division arrived at the colony Chelsea 426 in one of their warships. (NSA: The Taking of Chelsea 426)

The Sontarans joined The Alliance formed to imprison the Eleventh Doctor in the Pandorica to save the Universe. At least one Sontaran flagship was in the Alliance fleet which arrived at Stonehenge, 102 A.D. (DW: The Pandorica Opens)

Several Sontaran flagships were seen in the Doctor's army against Lau'Tan and agents of the Shadow Proclamation.