[That notion] was shattered pretty quickly when Voldemort came back.
I always thought he drank too much.
It is a surprising but fitting end for such a villain, who is characterized by formality and tradition.
[Lucius is] thinking, ‘What the hell do I do?'"
Voldemort’s inner circle was feared throughout the wizarding world, but who was his most fearsome foe?
Source: SYFY WIRE, Pottermore