Drain is a function of the Abducto Beam in the Saucer.
Overview[]
Using the Drain ability while the Saucer is holding an object drains it of its energy, and it is used to repair the Saucer's hull meter when it is damaged. Introduced in Destroy All Humans! 2.
When its used while carrying a human, that human is abducted into the Saucer and processed for DNA.