0.55 content is only available for Patreon supporter. I suggest you to put a spoiler tag. Since some people here just only play in 0.54 update.
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Do you play in Normal Logan route? You need to play in Normal Logan route which you can gain his heart. Then, go to Wolves den and enter to the door at the bottom right of the map to process to the alpha den. After that, you need to see the alpha which will trigger the event.