The College is sealed off to protect the students and staff from whatever or whoever has been sapping magic from victims. Zaccheroni puts the students' survival abilities to the test, but with a catch: no sorcery allowed.
Picture something clearly and precisely.
.تخيّلوا شيئًا بوضوح ودقّة
Ihr müsst sie euch schon
klar und deutlich vorstellen.
Imaginez-la
clairement et fermement.
Immaginatevi qualcosa 
con chiarezza e precisione.
Imaginem de forma precisa e clara.
Представьте своё оружие ясно и чётко.