Inhabitans of the Middle World are (partly) destroyed (or will be destoyed) once by fire or draught, another time by a flood or the world is destroyed with a flood of fire or boiling water
People do not become young (usually do not shed their skin) anymore because certain person was bothered during rejuvenation or was not recognized by his family in his new guise
People (elder brothers, elder siblings, elder sister) disappear (one by one). A lonely woman has a baby or finds a baby or she becomes pregnant magically and gives birth to a boy or twins. The boy grows up, exterminates the antagonists, usually revives and releases those who had disappeared
To overcome a monster, the youth (twin boys) prepares spears and puts them all along the path from the monster’s den to his place. When the monster pursues him, the youth throws his spears one after another and ultimately kills the monster
People (elder brothers, elder siblings, elder sister) disappear (one by one). A lonely woman has baby twins (or more children) who grow up, exterminates the antagonists, usually revives and releases those who had disappeared
Person ascends to the sky (rare: descends from the sky; ascends the cliff) by a rope, a ladder, etc. Another person tries to follow him or her but the rope (the ladder) is broken or severed
All humans, members of a particular ethnic or social group or a ruling dynasty are believed to descend from a mortal man and a woman of supernatural origin