3 myths
God told Moses to give some of his glory to Joshua, not all. The rabbis built the entire theology of succession from that one missing word.
Phinehas kills Zimri during a plague. Twelve miracles keep him alive mid-kill, and the tribes put him on trial before God grants him a covenant of peace.
A prophet was swept into heaven by a whirlwind, transformed into an angel with giant wings, and has been arriving in disguise at every seder table since.