 Otherwise, the rings are only capable of the default abilities of flight and a protective aura.This is because the power of hope is nothing without the willpower to enact it.The Blue Lantern's protective aura allows them to survive in space and other hostile environments and can be manipulated to a limited degree even without a Green Lantern present, using it to augment their strength and extending it to form a larger shield, but this ability is almost exclusively defensive.