Kewu-pattern battleship

From Halopedia, the Halo wiki

The Covenant supercruiser is a Covenant battleship that is one of the most powerful, if not the most powerful, capital ship in the Covenant armada. Its keel length is over three times that of the U.N.S.C. Marathon-class heavy cruiser - over 3.5 kilometers. It bristles with a dozen energy projector turrets, extremely powerful beam weapons that fire a lance of highly energized particles at lightspeed that can lance through dozens of layers of titanium armor plating or decks. A single hit can spear through battleplating, destroy a starship's reactor, and essentially destroy it by removing its ability to fire its MAC cannon or manuever by its fusion drives. It has an effective range of over 100,000 kilometers, allowing it to "sniper" ships from afar.

One of them led the Covenant invasion of R.E.A.C.H., but was destroyed by the Pillar of Autumn. Several of them led the Covenant holding force over the planet after its decimation. Its deflector shields are extremely powerful, being able to sustain approximately 4 MAC cannon projectiles or resist a nuclear explosion.