Does a creature riding the displacer beast benefits from its Avoidance and Displacement traits?

Would successfully casting blindness on a Beholder disable it’s eyes?

Oozes can be grappled. Does this mean I can prevent a Gelatinous cube…

If a spell scroll was written with a language you could pronounce but not understand, could you use it?

You are a creature. Can you see yourself?

When 2 enemies are within melee range, do you need to disengage from each one?

If you critically hit with the attack part of Green Flame Blade do you roll extra dmg against the 2nd target?