You're a Discern of Life, So You Have Heavy Armor Spells

The basic mechanic of dungeons and dragons is you say what you want to do. If it's something like i'm going to attack that person, that's pretty easy. The only other big thing, and it's new for fifth edition, is the idea of advantage and disadvantage which can be conferred in any number of situations. Amso like a special power i'd use? I mean, no, it is a mechanic that can be used in anyNumber of situations. It doesn't all have to be about mud.