Ranger Horizon Walker, is Planar Warrior ability need to use bonus each turn to deal Force damage?

Are magic items excluded from benefiting from an adamantium coating via Xanathar’s rules?

Is it possible to Twin Spell Dragon Breath or Booming Blade?

The tables in XGE for “Awarding Magic Items”, are they based on a party of 4?

If you crit as an Arcane Archer and use Exploding Arrow to get an addition 2d6 would that damage also double?