Do Wild Shaped druids or polymorphed creatures count as “shapechangers” for Moonbeam?

Can giant crabs really grapple any size creature?

Detect Thoughts: Does the target know the identity of the caster as a result of the save?

Can you clarify handling multiple stacked “advantage” bonus at once?

Green-Flame Blade: Do you use your melee attack mod or spell attack mod ??