I have a shitty memory and often forget stuff, so for future me and my readers, I'll keep track of Yami's techniques and other stuff here:
[Stamina Sharing: Quirk Technique—Granted!]
[From now on, you can share your stamina and resilience with others so long you physically touch them, skin against skin.]
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[Quirk Technique Unlocked: Open Bones]
Yami had discovered he could control the movement of his bones, manipulating them like external weapons or limbs.
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[Quirk Technique Unlocked: Population Control]
[Description: Allows the user to suppress or activate the reproductive systems of any living being they touch. Perfect for ensuring no accidents happen—or for making sure they do.]
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[Reward: Unlock New Quirk Technique: [Lactation Inducer]]
Yami can force a woman to start lactating.