Bonus One: Here
Bonus Two: Here
Bonus Three: Here
Regain: Temporary downgrade to "normal" shiki
Notes: Natsuno's daywalker privileges will be revoked until I decide to give them back:
- He will be a reanimated corpse - no pulse, no breath, ice-cold etc.
- Sunlight will burn him to death
- No more enhanced hearing, smell, strength and speed. Still gets to keep the night vision though
- No more enjoying normal food. He'll only be able to digest human blood and feel an excruciating hunger if he skips a meal. He can drink other liquids if he wants, but they won't sustain him
- His regeneration remains unchanged
- The Sun El powers will be sealed because I don't want him to burn himself to death, as funny as that would be

I'm thinking he can get an empty package - once he opens it, he'll fall into a coma and wake up at sunset as a normal shiki.