Fantasy. A man is reincarnated after sacrificing himself from a magical explosion. After about 20 or so years he goes back leaving a sister not remebering nothing and try to find a way back to his sister.

[Ryan]

During his travels he learns from Merlin. To get into his tower he has to first get in, the answer was a door bell

[Minnikin]

Could you possibly rewrite the question? I am not sure that recananed and satafinsing mean.

[Ryan]

Sorry it that he was Reincarnation after Sacrificing from a magical explosion.