Shield penetration spell

The curse was used by Lord Voldemort in 1998 to breach the Howarts protection set-up by Molly Weasley, Filius Flitwick and Horace Slughorn.

The incantation is unknown but the spell must take a lot of power to cast, as Lord Voldemort casted it after Helga Hufflepuff's Cup was destroyed, one of his 7 Horcruxes