Can Hurl Through Hell Crit?

Ray of Frost: if this is cast on a creature with a movement rate of 10′, can it move at all?

Does the Helm of Brilliance Bonus 1d6 fire damage also applies on range weapon attack?

Do a Warlock’s Eldritch Invocations still function under the effects of a Polymorph spell?

Do the Monk’s Ki empowered strikes function when inside an antimagic field? …and Paladin smite?

Do the monk’s ki empowered strikes function when inside an antimagic field?