Invisible Flying Wizards

In one of my campaigns in one future session the group will come upon a castle. The gates are locked, there are guards on the battlements. Thus there is a challenge to the group to overcome: How do they get into the castle? Now this sounds like classic situation for Dungeons & Dragons. However through most of the history of D&D this was more of a headache for DMs if their group was at least level 5: Wizards had spells like Fly and Invisibility, and that made “sneaking into the castle to open the back door” boring instead of a challenge. So why would I put it in one of my adventures? Because 5th edition cleverly solved the invisible flying wizard problem!

Many of the spells in 5th edition are now using concentration, a new concept. If you want to fly, you can cast the Fly spell, but you will need to concentrate on it. Not only does that mean that if you are hit by an arrow, you have to do a concentration check or fall to the ground; it also means that you can only concentrate on one spell at once. Flying, yes, invisibility, yes, but not both at the same time. Thus the Rogue, who *can* be simultaneously stealthy and climbing walls, isn’t put out of a job by the invisible flying Wizard any more.

Having said that, for some classes the concentration concept is overused and ends up making their spellcasting overly weak. A prime example is the paladin, who has very few non-concentration spells, at least at lower to mid-level. Spells like the level 1 smites really shouldn’t be concentration, as they are already not very powerful and concentration means they don’t work with more important spells like Bless or Compelled Duel. For the Warlock the fact that Hex is a concentration spell and the very staple of his existence, makes any other concentration spell nearly useless.

So, yes, concentration is a useful new concept. But I think it is currently applied to too many spells and could be better balanced.