Blood altar quest?

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Vigious wrote:

I saw on a tutorial u need a net I don’t have nets to capture monsters so how do I capture them for altar

You needed nets in the actual league where Einhar and the beasts were put in the game (Bestiary league). But since then, Einhar has been given the task to handle nets. All you need to do is damage the beasts enough and Einhar will capture them. It's easy.