Da próxima vez que virmos Pirraça, ele está atacando os Comensais da Morte largando as cápsulas de Snargaluff sobre eles de cima.
É bastante razoável supor que McGonnagall tenha feito Peeves tomar conhecimento do ataque iminente e pedido a ele para ajudar na defesa de Hogwarts.
Even as they stood braced, looking for the opportunity to act, there came a great ‘wheeeeeeeeeeee!’ and, looking up, Harry saw Peeves zooming over them, dropping Snargaluff pods down on to the Death Eaters, whose heads were suddenly engulfed in wriggling, green tubers like fat worms.
‘Argh!’
A fistful of tubers had hit the Cloak over Ron’s head; the slimy, green roots were suspended improbably in mid-air as Ron tried to shake them loose.