When all miniatures added by an Upgrade Card is defeated, the unit it was added to can no longer use or benefit from any rules on the Upgrade Card, with the exception of additional upgrade icons granted to the unit.If an Upgrade Card that adds a miniature to a unit is discarded, but the miniatures are not defeated, the miniatures are not removed, but the unit can no longer use or benefit from any rules on the discarded Upgrade Card.For example, if Insatiable Curiosity is used against a Dark Trooper Unit: No Dark Trooper miniature will be defeated if an opposing Ewok unit uses the Insatiable Curiosity upgrade card to discard one of its upgrade cards. The Dark Trooper unit will no longer use or benefit from any rules on the discarded card, such as the weapon it may have granted.[Source] 