War Caster feat: Booming Blade as a reaction to enemy provoking at 5′ -> 10′, is a reach weapon valid for the melee weapon attack?

Kuo-Toa scepter: should I allow the 4d6 lightning damage?

Wish: If I were to wish to turn myself into a dragon, could I keep my wizard levels?

Player fulfilled the dark pact becoming a Vampyr

Gate spell: Does the summoned creature remain when concentration ceases?

Can you explain the relationship of the Rogues “Reliable talent” and “Expertise”?