doctorbadwolf
Heretic of The Seventh Circle
Right, but is a spell description that says ‘make a spell attack’ considered an attack?
It is considered an action. It’s also considered an attack, but the part that interferes is that using it is an action, and you can’t combine actions.
As an action, you cast Booming Blade, and make an Attack with a melee weapon. You’re making an attack as part of the action of casting Booming Blade.