What would happen if I cast Silence on a Bard, Calm Emotions on a Barbarian, or Immovable Object on a Warforged?

While the Bard is in the silence sphere, he cannot use spells with verbal components and no one would be able to hear anything he says or plays. However, you cannot cast silence on the bard, only on an area within range, so the bard could potentially move out of the sphere.

Calm emotions does exactly what it says. So, if you are asking, if you would be able to stop a barbarian from using rage, that would be a no. You can, however, make the barbarian indifferent and stop him from attacking, potentially forcing his rage to end.

Immovable object cannot be cast on a warforged, as it is a humanoid creature. It targets an object of a maximum of 10 lb.

Quote from Epic_Fiendlock >>

What would happen if I cast Silence on a Bard, Calm Emotions on a Barbarian, or Immovable Object on a Warforged?

1.  Your DM will tell you that Silence can't be cast on creatures - you must target a point in space.
2. Your DM will tell you that Calm Emotions can't be cast on creatures - you must target a point in space.
3. Your DM will tell you that Immovable Object can't be cast on creatures - you must target an object.

In all three cases, your example creatures have no particular interactions with your example spells that are distinct from other creatures in a similar boat (e.g. Bards will be about as impacted as any full caster, while Barbarians about as impacted as any full martial, etc) provided you target the spell legally and the consequences impact the creature in question.

Fair, I was more wondering if say a Bard walked into the area of effect of a Silence Spell.

A bard stuck in the area of a silence spell is mostly shut down. Bardic Inspiration relies on the target creature being able to hear the bard, and any spell with a vocal component cannot be cast in the AOE of the spell, and that negates the vast majority of Bard spells. Bards do tend to have decent DEX and are proficient in weapons like rapiers and hand crossbows, so they're not exactly defenseless while silenced, but they can't really use most of their abilities.

You'd probably be better off hitting them all with Hypnotic Pattern and calling it a day :) since it is an AoE spell that affects creatures within the area and will actually "negate character usage" on a failed save.

Thanks, I'll keep that in mind.

I too saw the reddit thread. A barbarian can continue rage by taking damage, so even if prohibited from attacking they can continue their rage by standing in a campfire or jumping off a 10- foot ledge or any other ways you can come up with for taking environmental damage. The others display an 8-year-old's grasp of the rules and are easily refuted by just reading the spell.

Are Bards, Barbarians, and Warforged common enemies in your game?  (Maybe Warforged Bards and Warforged Barbarians?)

More general advice:  Spells are very specific in what they do.  You can only target what the spell says you can target.  It only has the effect that the spell says in its description.  Read each spell 1st and then think how that spells interacts, keeping in mind the targets type (creature, object, humanoid, etc) and the rest of the keywords.

While its fine to ask here, the real question is "How will my DM rule on this"?  They might ask your character to make an Arcana check, after all its not what the players knows, but what the character knows (for most games).