I understand that so long as conditions are met, you can Sneak Attack as part of the melee attack from the Booming Blade cantrip.
Can you dual wield and attack with both weapons after casting Booming Blade? I understand that you probably need something like the War Caster feat and Subtle Spell to pull this off, but I don't know if the melee attack as part of Booming Blade is a bonus action or not.
Can you extend the combo if you had Extra Attack like those from either fighter, ranger, monk, or bard, and use damage-increasing spells like Hex or Hunter's Mark? It's safe to say this build is around Lv 5 or higher.
So is the following combo possible?
- Build (Human Rogue 4, Ranger 3, Sorcerer 3)
- 1st Round: Full round act: cast Hunter's Mark and Hex.
- 2nd Round: cast Booming Blade swing with main hand weapon [weapon + d8 + 2d6 sneak attack]
then swing again (if with extra attack) [weapon + hunters mark 1d6 + colossus slayer 1d8],
then swing with off hand [weapon + hunters mark 1d6 + colossus slayer 1d8]
Now if you dip in fighter, can you add Action Surge so you can get two more attacks from your main hand for a possible [2x weapon + hunter's mark 2d6 + colossus slayer 2d8] damage? And 2d8 thunder damage if the targeted enemy goes after the attacker (me)?