に なんぞ

[Kenshiromusou]

Yo, friends.
I know roughly the concept behind なんぞ (etc.), but, reading Naruto, I came across an annoying phrase.
俺と火影の名を取り合ったら、お前エ　負け犬になんぞ！！

I would understand "俺と火影の名を取り合ったら、お前エ　負け犬なんぞになる！！", but what's this に here?

Thank you in advance.

 

[Flaminius]

なんぞ is a Kantō variation for なるぞ, where /ru/ turns into /n/ before /z/.
In a more standard variety, your sentence is 負け犬になるぞ. Can you recognise it now?

 

[Kenshiromusou]

Ohhh, now makes sense. Thank you very much, Flaminius-san!!