Since you can move both before and after your attack (including spellcasting) the best cover is total cover.What are good ways to create cover?
Spellcasters in particular can benefit from cover. What creative ways can characters use cantrips, spells, and abilities to quickly and effectively create cover when combat begins, or is expected to begin?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.