Can Green-Flame Blade or Booming blade be used when invoking Charger feat?

I would like to find extra info/histories/details on the Sword Coast cities Resources?

Is there any particular reason why we’ve never left the Sword Coast?

When nobles travel the roads of the Sword Coast, where do they stay?

Green Flame Blade, Post level 5, can the additional d8 of fire be effected by a crit?