Does Meteor Swarm damage worn or carried weapons/armor?

Since some spells have been upgraded in Xanathar Guide, which version should be used for AL?

Whenever you’re mounted, where do your attacks, auras, etc. originate from?

Can Hunter’s Mark be applied to attacks made by Tabaxi claws?

Hex on a target and then cast Magic Missiles at the same target, what would the damage be like?

Is Life Transference spell intended that you can target yourself with it?

Adamantine Armor says “any critical hit against you becomes a normal hit.”, but why does it effect spell crits?