2

There are several instances where I noticed people use に to mean something along the lines of "and". Here's an example: https://youtu.be/3cjyUg-XjjU?t=24

I think the narrator says, "修理人が使う道具は、牛の皮、ハンマー、庖丁と呼ばれる[刃も?].

Also, a line from a manga that describes a superhero reads、

その能力はスーパーパワーに
ビーム・バリアー
飛行能力に回復力

The に in question is the one in the third line.

I've searched all over the web for something that explains this usage, but I've found nothing. Does anyone what it is?

2

に can be used to enumerate things and be translated by "and".

Literally, it means "onto" (I think), so it feels like you're adding up something onto another thing.

https://dictionary.goo.ne.jp/jn/166083/meaning/m0u/%E3%81%AB/

[並助]並列・列挙・添加・取り合わせを表す。「バターにチーズに牛乳」「月にむら雲、花に嵐」

It should be two words (or more) from the same semantic field. As you can see in the example sentences, the words are kinda related to each other.

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