Neville learned from his grandmother that after the Death Eaters captured his parents, Bellatrix Lestrange had taken them back to Lestrange Castle.
Lestrange Castle stood atop a hillside, as though looking down upon the world from on high.
Dark green ivy sprawled recklessly across its walls. Sunlight fell upon the sharp spires, yet it could not dispel the castle's inherent gloom.
Neville did not land directly before the castle gates. According to what his grandmother had told him, Lestrange Castle had numerous protective enchantments, and barging in recklessly would certainly trigger them.
Following Wizet's instructions, he needed to use the magical items in his possession to gradually dismantle those protective enchantments and enter Lestrange Castle by "infiltrating" it.
After all, he was alone against four powerful Death Eaters. He had to remain completely alert and do everything possible to pick them off one at a time.
To defeat the four Death Eaters one by one, the best approach was to "infiltrate" Lestrange Castle without causing any disturbance or setting off any alarms.
This was the optimal solution for the current situation among the hints Wizet had given him.
If things had been different—if enough people could appear here, including his grandmother, his great-uncle... even his parents' Auror colleagues—then they could have used another method: a siege.
But after Frank Longbottom and Alice Longbottom's souls had been tortured by the Cruciatus Curse, they had become extremely fragile.
Neville could only fight alone now, relying on his magical items and magical plants to do his utmost to offset the disadvantage in numbers.
That was why he was being so cautious. Even if he could not be certain that protective enchantments existed, he still had to test and dispel them.
Neville took out a burlap sack enchanted with the Undetectable Extension Charm. After