There was no clear answer to the question of whether the Dota Viper would drop an A-grade staff or not. Generally speaking, for a hero like Viper, the effect of an A-grade staff might not be as good as directly dropping the Black Emperor Staff or the Heart of the Demon Dragon. This was because Viper needed to increase his attack power and magic output in the middle of the game, and the attack power and magic bonus provided by the A-staff could not really meet these needs.
As for what 6-slot equipment Viper would drop in the later stages, it would depend on the player's choice of strategy in the middle of the game. Some players might choose equipment like Radiance, Butterfly, or Sheep Blade to increase their survivability and damage output, while others might choose equipment like Jumping Blade or Hidden Blade to increase their control over their teammates. In short, Viper's equipment selection in the later stages needed to be decided according to the specific situation.
In fanfiction, the relationship between Black Widow and Hydra can be very complex. Some fanfics might explore her time within Hydra, perhaps delving into how she was indoctrinated or how she managed to resist their control. It could show her as a double agent from the start, using her skills to undermine Hydra's plans from the inside.
Yes, the main characters of the novels titled " Coiling Dragon's Super Divine Beast Opening " and " Beautiful Man: The Scientist of Hydra " were both Hydra.