[@Slime] For instance, a pregnant woman wished for the child in her womb to be 'strong'. It was so strong that giving birth to him killed her. The story has not progressed far enough to see if there are any other consequences.

Another person was in search of his lost wife, and he wished to find her. On finding her, things didn't work out and both committed suicide (after starting a massive tribal war, of course). The story has not progressed far enough to see if there are any other consequences.

The third person has so far been quite lucky.