What about the riskiest worlds?

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1 - So I’m a Spider so What?

1. The protagonists were reincarnated as the being that most suited their soul. There is a real possibility I could be reincarnated as a slug or worm
2. The world is ruthless. The MC was reincarnated as a spider in a dungeon about to get eaten by their mother

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2 - Ascendance of a Bookworm

1. If you are born with the devouring and not a Nobel there is a high chance you will die.
2. If you are not a Nobel and upset one you could be killed.

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3 - Death March to another world rhapsody

1. There are lots of stong monsters
2. Demons seem to pop up regularly