EDIT: The materials needed for custom mods can vary between different weapon classes. It's always some general bones and gathering nodes from the lead lands (which I have a guide for) and a monster specific part from the lead lands. See https://www.youtube.com/watch?v2WYLEQ5Qz8o to farm the special gathering nodes in the lead lands

My comprehensive guide to the new augmentation system in MHW Iceborne, including a breakdown of custom mods. I explain how to augment, how to create custom mods, which weapons can be modified, what the augmentations/mods cost and what stats they provide, as well as a link to a table with a list of all the information conveniently summarized.

You'll need a lot of materials from the guiding lands, including those from the special gathering nodes that I have a guide for on my channel. You'll also need stuff from the hardened monsters.

Link to the table: https://docs.google.com/spreadsheets/d/1gAWRSi7OAkJAM4dWPt5d1JEFF0iKQ_44ec9uVwW_yX4/edit?uspsharing

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