Magicka .XNB model files.

[CameronCarson]

It's not "code" it's just "parameters" (values, addresses, counts). With a model loaded enter parameters then press File/Save H2O.

But how to find parameters easily

[shakotay2]

There's no "ease" - it's hard learning in most cases. "Learn it to earn it."

To get the vertex start address search for "-A0" in the decompressed files, then skip 4 floats (16 bytes), then another 5 bytes.
(First vertex (3 floats) in green rectangle.)
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xnb_lz4_decompressed.png

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How to get the counts is here: