Snotlout says that Gobber would have eventually made him official weapons inventor and he would have created the greatest weapon known to man , the mace , axe , sword but in viking for hire when gobber brings out all of his weapons , you can see the mace, axe sword has already been invented .
The Whispering Death's fire should not have destroyed Toothless's left tail fin in Astrid's scenario because dragons are resilient to fire. Astrid should know this.