This riddle is not a word but an idiom.
I guess the bottom of the puzzle is: anticlimactic.
Because in the Water Margin 108, Chen Da and Lei Heng, nicknamed the winged tiger, jumped into the river tiger, in front; Jie Zhen Yang Chun's nicknames are two-headed snake and white snake, so the answer is anticlimactic.
. Please accept the correct guess, thank you!