We are a group of new players. I feel that I miss some important properties of the levitate spell, as it proved extremely powerful in the last encounter in Cragmaw Castle in The Lost Mine of Phandelver.
The party caused an alarm to ring, which caused the entire final group, with bodyguards, to prepare an ambush when they stormed the last room.
The Doppelgänger
managed to immediately down a player in the surprise round. After the rest of the enemies chucked away quite a bit of health as well, it almost looked like it would become a full party wipe.
The wizard cast levitate on
The Doppelgänger
(and it failed the saving throw), which effectively disabled it. Thanks to the 10-minute duration and the wizard carefully saying that it "should float riiiiiight in the middle of the room" (so it couldn't grab any wall object to pull itself down) it wasn't able to do anything during the entire rest of the fight.
From my understanding, it was not allowed to re-try the saving throw on its next turn. The other enemies were not able to break the wizard's concentration either as she was hiding behind the rest of the party in a small doorway which blocked the enemies from reaching her.
I'm happy the party managed to survive the encounter, but feel that casting levitate on any melee-based enemy could quickly become a effective, but boring, strategy. Is there anything in the rules that I've missed?
Best Answer
You didn't miss any rules; levitate can do that if used cleverly
Your party's wizard was being clever and resourceful. And your question has in it the key to your answer: the enemy did not make the saving throw.
An additional point: the party acted with good tactical sense, by preventing the wizard from taking damage and thus being subject to a concentration save. That's two smart things your wizard, and your party, did.
Something to consider: a levitated enemy can still cast spells or throw missiles, or even give orders to underlings, which a held or Tasha's laughing enemy cannot. That your party's wizard used positioning well is good.
Had the enemy made the saving throw your party's wizard would have spent a precious second level spell slot and Nothing Would Have Happened. This is one of those "all or nothing" risks taken during combat. Likewise, a failed concentration check creates a "nothing" result.
What you are seeing is how swingy the "save or suffer" spell family is.
A similar thing is true about the mentally, rather than physically, controlling spells: hold person, hold monster, Tasha's Hideous Laughter, dominate, and a variety other control spells that are intended to put an enemy out of action. (Hence "battlefield control" as a thing that casters can specialize in).
That's intended - taking an opponent out of a fight to make the rest of the party's job easier - but the risk is that the enemy makes the save and the spell does exactly nothing.