You will reach the Mantova hut from Indren point and you will spend there the night. The next morning you reach the Lys pass following the same itinerary to the Gnifetti pass. You go down to Zermatt on the Grenz glacier and you will have a wonderful view of the Monte Rosa chain.
You spend the night in Zermatt and the next day you go up with cable cars till the Piccolo Cervino, you climb up the Castore and you go down to the Quintino Sella hut for a pleasant meal. In the afternoon you come back to Gressoney.