The Covenant Poltergeist is a terrifying example of Covenant reverse-engineering. Using the same technology as the human-conceived Magnetic Accelerator Cannon, it fires slugs of charged plasma at extreme ranges with deadly speed and accuracy. Set up on a hillside or the far end of the battle, the Poltergeist makes quick work of armoured structures or targets, and can even knock an enemy dropship clear out of the sky. Toting only a single mounted plasma turret, its defensive capabilities are limited and it is therefore deployed with a small convoy to protect it while it recharges between shots.