[Smedley]

Grindelwald stole the wand from the previous owner, remember? So he was not the “true master” of the wand and it did nothing special for him.

Actually, I thought that Grindelwald managed to stun the owner as he was making a getaway, so the implication is unclear.

[r9etb]

Actually, I thought that Grindelwald managed to stun the owner as he was making a getaway, so the implication is unclear.

He stunned the guy after he'd already stolen the wand ... he didn't have to win the wand in a duel.