Sleeping Sentry
(Rule)Description: When you deploy an Obelisk, you can choose whether it is powered up or powered down. If it is powered up, it follows the normal rules for a vehicle of its type. If it is powered down, it may not move or shoot, but has a 3+ invulnerable save. You can choose to power up the Obelisk at the start of any of your Movement phases. An Obelisk that arrives by Deep Strike is automatically considered to be powered up. Once powered up, an Obelisk cannot power down later in the game.