Sustain

You touch a willing creature, uttering mystical incantations. For the duration, the target creature does not need food or drink to sustain itself, and it has advantage on Constitution saving throws against exhaustion. Additionally, the target creature is protected from the effects of extreme cold and extreme hot weather. If a creature is suffering from exhaustion due to hunger, thirst, or cold/hot weather before being affected by this spell, the exhaustion is suppressed for the duration of the spell.