Does a spellcaster know when concentration ends on one of their spells?
For example, when a wizard casts invisibility, that target is invisible until they attack or after one hour. So if the character attacks and the spell ends is the wizard aware that their spell that they are concentrating on ended earlier than expected?
The wall of light spell states
When the wall appears, each creature in its area must make a Constitution saving throw. On a failed save, a creature takes 4d8 radiant damage, and it is blinded for 1 minute.
—Xanathar’s Guide to Everything, page 170
The spell duration is "Concentration, up to 10 minutes," so the durations are already different. Would this imply that the blinded condition it affects would continue even if the spellcaster ended the spell or were knocked unconscious?
The entry for a roll of 13 or 14 on the Wild Magic Surge table is:
You cast confusion centered on yourself. (PHB, emphasis mine)
Confusion is a 4th level concentration spell. The rules for concentration state that:
If a spell must be maintained with concentration, that fact appears in its Duration entry, and the spell specifies how long you can concentrate on it. You can end concentration at any time (no action required). (PHB)
The intent of the entry on the Wild Magic table seems to be for everyone nearby, including the caster, to be hit by confusion, essentially a less-bad version of casting Fireball centered on yourself. However, since the table doesn’t specify anything special about concentrating on the spell, the caster needs to maintain concentration on it, and consequentially the spell should end if they stop concentrating on it.
RAW, is there any reason someone who rolls this result on the Wild Magic Surge table couldn’t immediately drop concentration and end the spell?
I’m a fairly new DM, and I’ve run into a problem. One of my players tried to cast Modify Memory on a golem. Golems are immune to being charmed, but Modify Memory doesn’t say creatures immune to charm are unaffected. I decided to let the spell through because of narrative reasons. But, we had a discussion.
Modify Memory says:
On a failed save, the target becomes Charmed by you for the Duration.
The spell is a concentration spell for 1 minute. My question is the following: If I had not let the spell circumvent the golem’s immunity to charm, would the caster know that the spell didn’t affect the target, since it requires concentration, but there’s nothing to concentrate on?
Ring of Shooting Stars says
Faerie Fire: You can expend 1 charge as an action to cast Faerie Fire from the ring.
Since it says you cast the spell from the ring, I wonder if you need to maintain concentration on the resulting spell. Moreover, is that something particular to Ring of Shooting Stars, or is that how it usually goes with casting spells via items?
From the Sage Advice Compendium:
Does a Monster Slayer ranger’s Supernatural Defense feature apply if a creature damages the ranger, thus causing the ranger to make a Constitution saving throw to maintain concentration on a spell? Yes.
Since the Supernatural defense works for concentration, does the Slayer Counters works as well?
Does the invisibility that the Fade Away racial feat (for gnomes) grants require concentration or would using it drop any spells the user is currently concentrating on?
The wording doesn’t specifically say that (you become invisible, you don’t cast the invisibility spell). I am unsure of how it works, and can’t find the answer online. How does Fade Away work?
Does an elemental summoned from an Elemental Gem require Concentration? I am getting hung up on the "as if you had cast" part. Other items say, "you can use an action to cast the [spell]".
This gem contains a mote of elemental energy. When you use an action to break the gem, an elemental is summoned as if you had cast the conjure elemental spell, and the gem’s magic is lost. The type of gem determines the elemental summoned by the spell.
Related question: Do magic item spells require concentration?
The distinction I’m asking then is if the Elemental Gem is a spell or a spell-like effect.
A druid that is wild shaped reverts "when" they drop to 0 hit points. Does that mean other effects that occur when a creature drops to 0 hit points also occur (though possibly in any order of the druid’s choice)? Specifically, if the druid were concentrating on a spell, would dropping to 0 hp – even momentarily – suffice to cause the druid to lose concentration by being incapacitated?
I can’t figure out what RAW or RAI is on this one – does anybody have any pointers (e.g. a rule or rule interaction I missed, or some sage advice)?
The new Psi Warrior Fighter subclass has the feature Psionic Power which has the following option:
Psionic Strike. You can propel your weapons with psionic force. Once on each of your turns, immediately after you hit a target within 30 feet of you with an attack and deal damage to it with a weapon, you can expend one Psionic Energy die, rolling it and dealing force damage to the target equal to the number rolled plus your Intelligence modifier.
Based on my earlier question it seems the consensus is that Psionic Strike does not double if the triggering attack is a critical hit.
If Psionic Strike is used on a creature concentrating on a spell does the additional damage prompt a second Constitution save to maintain concentration?